Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2dcceee4b3e822…

MALICIOUS

PDF

88.9 KB Created: 2021-07-29 09:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7ba856be40242299f99a96eb9c505b34 SHA-1: 054101c7903644721df874dc1f775062336d17fa SHA-256: fd2dcceee4b3e8221c681a121bc9af33e258b47324c3d49409171c0f12b88711
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document employs a social engineering lure, presenting a fake browser extension or update to trick the user into downloading a payload. While no scripts were directly extracted, the presence of numerous links to potentially compromised WordPress sites and disposable hosting suggests a distribution mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbb082ee2e---94203720496.pdf In PDF document text
    • http://crm333.com/documentos/file/maxagamumixogejifirexu.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb1648d69d---73440185094.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/93021025972.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/65893070147.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099e2369cb6f---46158252992.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/38304865221.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/b9673b56f71184fe6fdde901c7ce06b5/wesirexowav.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/9skp4fuans9gb1ue9ec7m7qp93/towexusaru.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/matedajalerugewederizuvi.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45f51c7281---dijuxudebi.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/nizovajepufamesegid.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/81258179547.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/77eaea2cd7881b7480a212a661d45de8/21981252562.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/nobugas.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/32b9929cf5ed590dc679e658fc22efb0/rubenig.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/mabanaxuga.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d2882353850e7b18518ff8ae5503e586/6374513911.pdfIn PDF document text
    • http://briarcliff68.com/clients/71184/File/49157866981.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/e986fc10c6e51432c64aebd404f2f959/8918423826.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/6dd365a9aa91123a779a4d421b8910f1/90171168398.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aece570363---dizabani.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8b3e86f23---xoxupofoxajim.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/13488481887.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/getorufevisiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+install+logitech+k800+keyboardPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E8 11404 bytes
SHA-256: 3afe182c72ca55b6ff6a41a9c2eb72d58b537ad817d5fdd374c7a33ee0f70d1d
font_01_sfnt_off00011091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11091 17188 bytes
SHA-256: ec5fd49f318b1871669deb1ae22d08bc05c09b60e3da1e58f412bb50e828e573
font_02_sfnt_off00013d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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