Malicious PDF — malware analysis report

Static analysis result for SHA-256 3babef6c5113896b…

MALICIOUS

PDF

75.1 KB Created: 2020-11-30 20:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a4b406e602b807558d8cba210e5efa70 SHA-1: 15d5ab62ca0c6a0fac8c17a95f09af1cdd9751b2 SHA-256: 3babef6c5113896b9db2249edb2fde33cc54d45361c583d7b544c14b31f9fe75
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=watch+the+grinch+2018+online+free+reddit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f9dae16dcd93.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/dolunabijosim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f952cc66a384.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/98867261414.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/hell_let_loose_steam_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/nanejedad.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/lelimajoluneg.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/bosch_router_guide_bush_30mm.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe08425147b14804f9d138/1606289479505/voditazigovuvelewibunumun.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/physical_science_math_skills_and_problem_solving_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/vopadofugon/79429533209.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/duvanepevozesoxiniwiwafit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f0de5bcb0228a282afe8/t/5fc34f05fa04221c718a11e4/1606635270210/number_6_recyclable_plastic.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06b0d2e537a05ef0695ba/t/5fc416c73f75b166435404c9/1606686408922/holomua_elementary_school.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_off0000e6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F2 5640 bytes
SHA-256: 1158e3733f8f4198c6595013060d9b63afc5d230a589a082e29ee4f5101b8369
font_01_sfnt_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 11028 bytes
SHA-256: 80e5977ae4d0556b77f713ec2ef99551820d235255646024e41749f46cf1653f

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