Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07bd04a5d13ef1a…

MALICIOUS

PDF

82.0 KB Created: 2021-08-07 04:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 23ceee39b499b84efbf3a8a086217388 SHA-1: 125a0a12480692ab49e5004627a390b62a98d848 SHA-256: f07bd04a5d13ef1a1f7f0ee117ac79dab4abf99e487a8b3c008481ad9fef925a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which are identified as compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware. While no scripts were directly extracted, the presence of numerous external links suggests a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://emke.hu/uploads/ckfinder/userfiles/files/6150576131.pdf In PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/93027491080.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/41d41c57153a8f3df0d0538d669d33aa/4739476526.pdfIn PDF document text
    • https://eurocomm-italia.com/file/41072515317.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/181530d917a1097b606a28c43007a3ad/nanorore.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/ai797i5q9mgt43rqldj6neheth/musuluwifanaxe.pdfIn PDF document text
    • http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/6803134771.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867460d0d26---5908993852.pdfIn PDF document text
    • http://perrymanreunion.com/clients/f/f8/f8644f0eb9578147d5589f75b8c3e300/File/14510779649.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/iod5qcoajmpji7nakg07glt1ep/79578665663.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe8c0d39fe---damibenobibuxeliw.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/totegodoribif.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/h7rufmom1iej32mj94970ns0r0/36526465760.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/31cf39007808d9bb8862f04cd4e2eb6e/jufikizuxalawavamojobeda.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/64492533023.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608780a68f13f---fasofur.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/pudarowofid.pdfIn PDF document text
    • http://marymo.ru/uploads/files/neletazutovofufuwi.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/7latu192n62jror136gef4jrlu/naloporovalexogazexino.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/9fce7ef87df6e30505a8c136f6aa2bd4/taxabumagupaf.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/xosegojasugodidugonad.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/8a8d25060c9a799306a8ca1da4250761/35607988995.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3dc3204f1---3951696180.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609a78a11262f---6212025855.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/3cea9ad904f5fafd4a9f56a7e8487641/46469106649.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/hvtci5gn0pt9tug94riegr0t53/18091799911.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=sanam+teri+kasam+full+movie+mp4+download+hdPDF 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_off0000db53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB53 16976 bytes
SHA-256: eec0bb49f7215fc86983f6ef37d39b8d3efa46822206b62783a8e40c53d7bf1e
font_01_sfnt_off000107ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE5 11260 bytes
SHA-256: c59a6bcf1878f49c4aefed18e5c4d6fa729c1b164c166e803cc442d3813184e5