Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e12fd7ecc52deb…

MALICIOUS

PDF

98.5 KB Created: 2021-07-13 21:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5059a58734e0b1b18d49d6153b3da0bb SHA-1: a14c7f4401a9263ef215899f571e8a48aadf8041 SHA-256: d7e12fd7ecc52debdd736209fe72f35636e09842497b6a25dd0e332244e10f35
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm pointing to compromised WordPress uploads and other disposable hosting, likely to distribute a payload. The presence of a 'password-protected archive lure' heuristic indicates the document is designed to trick users into downloading and decrypting a malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/n98klcv3dp2t0t6vsn6pa84km8/37527611826.pdf In PDF document text
    • http://podlahypilat.cz/admin/file/67973108292.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071794fb126e---savabuzexujiloxisudamefe.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b656fdcec0f---24666588078.pdfIn PDF document text
    • http://7tec.ru/userfiles/files/kenipofuzagati.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/8951f9ed53dbac2f1a4afa16a430a815/29195033958.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3700ebe92---vawizeduzita.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d0bb1c7fce4---litemadekefurafolivugef.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d51a6beabb---45390991271.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/6eea778a7a74bd444f70c13b575fc174/96273332992.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/60947022150.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/028af9f0726d85bfd1cd8651ebde7a7c/napedojikoje.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/8a43ca8c3b1002bb96ef4d0fa71b335b/22626715751.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fea7985bac319aa7e4e46ad103891b40/rewojorojexababoxabope.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7e421b7a0---xezaveravunekepovu.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607207c43e6f9---97623681275.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/23/file/gebosasesaredisujuselonit.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ca2e97fd8---96735279825.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/369e90a236647395b5d82af7691a33a2/79897289357.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/lufagkc0tdvnhn4f0cj53su2k0/ruvudojukodatirovukos.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/jesefomidevujaw.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/17692898675.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/karuruzoboxafabazevapu.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/kedesiluvedelosarenojixes.pdfIn PDF document text
    • http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/kukaweramakosifawirevov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=structural+concrete+theory+and+design+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f756.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF756 20388 bytes
SHA-256: dd74f70c39d24fe3271f8a16c5917cf616d628306a313a9d4e328026cbe5613c
font_01_sfnt_off00011998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11998 18300 bytes
SHA-256: b27bdda221df8bee61b2f427bd971b8c0bb4be3af678e01df69e4e85851fcdcc
font_02_sfnt_off00014807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14807 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001601e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1601E 11188 bytes
SHA-256: aa8a45cd4cfaeff3b97d92166dceb6f7aef013e61546b95da8434466c79cd880

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