Malicious PDF — malware analysis report

Static analysis result for SHA-256 395c5d9a7a098a73…

MALICIOUS

PDF

73.1 KB Created: 2021-06-03 03:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 09ea542c3803f5bacc09ad8dde1c4441 SHA-1: 8abe6937e8d7c7a7742e1606b4b994333875a147 SHA-256: 395c5d9a7a098a731289e615a73c8625f8933a467303aa01156ed628b85379cc
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://oniceh.ru/pbw?utm_term=personal+expense+tracker+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449185/normal_6029680eda14b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481072/normal_5fcf17a1b6df7.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/tokaxego_lerax.pdfIn PDF document text
    • https://maxamiboxu.weebly.com/uploads/1/3/1/6/131607029/tekofinu-vamoto-mupoju.pdfIn PDF document text
    • https://dararokipo.weebly.com/uploads/1/3/7/5/137518135/6c05a27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469350/normal_6046788b35dae.pdfIn PDF document text
    • https://dojeviwenos.weebly.com/uploads/1/3/4/4/134491393/lubupor-fagixuvokunu-zenijenol.pdfIn PDF document text
    • https://likuwiwekadu.weebly.com/uploads/1/3/1/8/131857000/8084969364f2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499995/normal_5fdee574c3ac0.pdfIn PDF document text
    • https://romemigevowuf.weebly.com/uploads/1/3/4/3/134335991/ae866a28ca.pdfIn PDF document text
    • https://sekeratogo.weebly.com/uploads/1/3/4/6/134683690/gopakawidiju-tisukov.pdfIn PDF document text
    • https://rizamarorupewug.weebly.com/uploads/1/3/4/5/134527102/ruzobijavinadamaxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388819/normal_5fca99833a578.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/515335e7-01bc-4138-9987-58b897181b6b/can_you_ask_tarot_cards_yes_or_no_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0913cafb-2cba-4083-b7dc-b3136cf880f1/friends_trivia_night_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ab30a5-c4a7-4515-9454-a8e53e26a6bc/mustang_940_skid_steer_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb549144-741e-4b3e-84b2-389ffb8037d9/74613705839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ba7e17-8880-40ab-ab19-d04ab89cea79/42026735250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e29ffa0-8bd2-489a-98ae-786efcd2387f/gujejusiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc861ab-7f1f-4c5d-82aa-7e93c12672a8/84921463634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d05a6a-a274-41d0-b0e2-beb99feaa530/delagezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f18a73ca-a6cb-4aa5-8811-e5c6d1854968/autocad_commands_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e0f6ebf-0200-4335-a49a-b861643c39d0/mowewovojitobizipur.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19A 5212 bytes
SHA-256: 10ccf0741f3d3ccd21a14c9af0b3880344061ea3eaf9ec81e4f9bf55fe42472b
font_01_sfnt_off0000f342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF342 10512 bytes
SHA-256: 4630128c841015971015c859f8f5ff355dfc29f0cc788330e1196c5884ded076