Malicious PDF — malware analysis report

Static analysis result for SHA-256 063fb2d1f1552112…

MALICIOUS

PDF

86.0 KB Created: 2021-06-25 15:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: eec7c03235ac7f8bdd2d3f564bb74b01 SHA-1: 5e4d6dbb691e83f9e4641429fc3fa965626a0dce SHA-256: 063fb2d1f1552112f2cc680a2b3f2f6240669a2a9c2d5afcefc1c87ab56c5bdd
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised CMS upload links further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://catamma.ru/uplcv?utm_term=the+division+2+gear+attribute+sheet PDF link annotation
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/nh2pgm486basrn8tl2lb89gj8u/75531646905.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/1c1584119befda55bf3d59b939edc71f/44730799080.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/4abb6c30ea73bc771480e9779c7e6a05/purovupafuvemubibajepi.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/pivis.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/11261699266.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a93a2b6d339---fimipumodopefiduluripafu.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fed3d30c7a---galofedovuxagunuwig.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/20199333408.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/79659668893.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/dcb3d165055d1c7178c874d090350c18/bibimuwikexugesoniju.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c36bb5f0f93---66287477987.pdfIn PDF document text
    • http://epmachine.ru/d/files/96480075821.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd70872db6---tatateguxejakesu.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd71331403---60937775304.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16082f8e588ca5---zubiribinofe.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/7708dbcfd52b186fd9d5126a269cfd58.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/5891433e52b6e6ae05c1203a4c5c33f5/51209211798.pdfIn PDF document text
    • http://faxik.ru/ckfinder/userfiles/files/tonusozalaf.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/g15pef583cdajv16qu1k7t4vh1/31717103848.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/81788442131.pdfIn PDF document text
    • 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_off0000ec4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4C 17680 bytes
SHA-256: b90697a4831166efb0c12a10e19c7df8cd7b4569819ad95df493511da49253ff
font_01_sfnt_off000119e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FB 10872 bytes
SHA-256: f9efe53261af145a418940fd612f37e75036d513d84913c3f27a8cdab235f297

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