Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab469d6f0eba50e…

MALICIOUS

PDF

80.0 KB Created: 2021-05-23 17:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 066d4e835875e22b239232cb3a3cdd68 SHA-1: fb677192f2f3012f3531ed9e8834df03cea2e5b0 SHA-256: 3ab469d6f0eba50e3d59b221b6fecd9560ee3decfb4aa3f21f176585afae053f
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the heuristics point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://druttle.ru/strik?utm_term=1%2529+el+m%25C3%25ADnimo+com%25C3%25BAn+m%25C3%25BAltiplo+de+6+8+12+es PDF link annotation
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/26404d6c15.pdfIn PDF document text
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/bitewosajitefa.pdfIn PDF document text
    • https://nifavoweju.weebly.com/uploads/1/3/0/7/130739528/26b66973518fce.pdfIn PDF document text
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/d69a8ddbeaf8ee.pdfIn PDF document text
    • https://vokipokulolobu.weebly.com/uploads/1/3/4/0/134016984/45aaa6d4323.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8eed5f2c-9156-4361-9284-79d01743710e/juzagowol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473b5bdb-24ad-46f0-9ad0-8a946cb80c72/how_to_use_cisco_phone_at_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c75eb83-1774-4278-9606-dda739df26ca/how_to_claim_scratch_off_lottery_tickets_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0882afd6-44a7-4761-aa7e-cb3a773a0838/sri_rudram_namakam_chamakam_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1774d60-c9e4-4c95-add7-f66813da068c/79797095609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9005fa5f-10ba-4510-a240-3daeaf770206/raxavujaxototoras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb73c8d6-6777-4df8-97e5-de61506c850f/what_type_of_oil_for_toyota_forklift.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841b3df9-931f-4842-a718-e79182a7900e/grounding_skills_for_panic_attacks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf28b25-667f-496c-9653-3fc6f5212f88/asus_z97-k_motherboard_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d0d7e3-01b5-446d-a6ba-d97bd7d76eb2/intro_to_trigonometry_functions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc66fae3-7808-4e80-82f1-23a132e0f764/41614724595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/013f36d9-d4f0-421a-aa74-6e47e6189891/how_do_i_clean_my_vicks_cool_mist_humidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0c7ed09-fe4a-455f-815d-8a1b0f577a3f/intro_to_accounting_course_description.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D7 5384 bytes
SHA-256: c4d95e3d6351b13c953780b15b10e9149a9a14b49d2c4ab6c86a56d3fd9ab462
font_01_sfnt_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 11908 bytes
SHA-256: 03978dfd52ba7f481b1813fc922b8383ba761a836d41f1d44b49e722c3949783
font_02_sfnt_off00012218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12218 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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