Malicious PDF — malware analysis report

Static analysis result for SHA-256 7291e74fee959c97…

MALICIOUS

PDF

99.6 KB Created: 2021-04-20 16:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f01375d9508612c3ed32f38aed6fb825 SHA-1: 54450f515264ade2e7f8564dae91a3ee256f4250 SHA-256: 7291e74fee959c97295030e1c53b35a534f94568b9276424f738102ac23ca4da
134 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. It uses an urgency-based lure. 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 0.9998

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/strik?utm_term=is+kingkiller+chronicles+good PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391899/normal_60650b801622c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489725/normal_5fe25a32c1899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_60357034a400e.pdfIn PDF document text
    • http://zitozejugalafex.22web.org/antigone_jean_anouilh_francais.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/23855119927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_60692790d99fc.pdfIn PDF document text
    • http://deemonatrafik.xyz/124412425800wjiw.pdfIn PDF document text
    • http://gujozulogisin.scienceontheweb.net/athletics_jumping_events.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_604f08b7d5343.pdfIn PDF document text
    • http://joxezorov.mywebcommunity.org/rizasodosiluxujitowufi.pdfIn PDF document text
    • http://giftcard-sale.store/625983596960cs86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486221/normal_5feafd7929a63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_605a2d4e8a5c2.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
    • http://surenus.epizy.com/60796002125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8146f30-6cae-4ca3-a43f-797049616119/rules_of_the_game_of_life_empire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb955f0a-68a9-4852-b323-d1a58a8fd1ac/gluten_free_chinese_food_recipes_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7190df0-2694-4c51-b061-1acb6a1727d1/why_looks_are_the_last_bastion_of_discrimination_thesis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b755315d-17d5-493a-87f4-4cb7d575adfb/taotao_50cc_scooter_ignition_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b076f8-aacb-41a7-abe9-3b6676e63c65/90743873121.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E87 4700 bytes
SHA-256: e3e1518621a4368d042ddf5667271116cf56526459cdf7389fd7376af1f12d89
font_01_sfnt_off00014e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E5B 10788 bytes
SHA-256: e7d0fb6a24bfc066e816ef00f4ea18d8233affdf79b1f638d7d3626a4298e347
font_02_sfnt_off00017362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17362 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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