Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0f2dc46fac80f3…

MALICIOUS

PDF

95.0 KB Created: 2021-04-14 12:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a85e1f6e09c31740ac788cce82747dcf SHA-1: 9373472cb2d2e517c2100a00c1be35650e99d54f SHA-256: 6d0f2dc46fac80f37c817a8efdc60c8eca3d2cab3b17d3e6a5866e275416fc82
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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 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://jacksth.ru/strik?utm_term=itil+v3+foundation+certification+body PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488817/normal_603fc1120754b.pdfIn PDF document text
    • http://prizinsta.online/peavey_classic_30_made_in_usa_manualjpm4y.pdfIn PDF document text
    • http://gugolufixa.mywebcommunity.org/wilil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409799/normal_5fe2253911583.pdfIn PDF document text
    • http://liketime.fun/jadiwov6i50.pdfIn PDF document text
    • http://nemagufi.mywebcommunity.org/89437402979.pdfIn PDF document text
    • http://infokurs.design/best_new_games_2019_androidf7qy3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492901/normal_60694e95aab7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393483/normal_5fcd4613ef9eb.pdfIn PDF document text
    • http://babblescoop.store/gilusuvuziwutogoxirc0djd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404515/normal_5fc67902ca0d9.pdfIn PDF document text
    • http://tixshopclub.space/31634965964zk9l4.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/88c54ccc-77e8-4afb-af63-1c4d94179e94/64064693953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505b04a4-4c0d-448a-ae21-fa4b42e2c9e7/fajebosojepimibupan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da48d16e-c3e2-42ca-a565-1e32efa385e3/zutanusizurebarufapip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb18bce-bbdf-46aa-a891-d07b18a63185/how_to_reset_a_keurig_mini_brewer.pdfIn PDF document text
    • http://nutajowaga.rf.gd/materials_letters_guide_for_authors.pdfIn PDF document text
    • http://bofurirekotiru.epizy.com/30456390248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cff409a-cadb-4cbc-933f-574a5177496c/josajis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e61c493-f4f6-4682-9cc0-7719ba310f7c/jovafer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/866dee20-ad07-4ce8-ab28-19b3eee6d494/lord_of_the_flies_short_summary_chapter_3.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_off0001252f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252F 5120 bytes
SHA-256: 842570e728c21d4265fa30e3530185cc382353e50c82efd3b64c02cd346ff3b3
font_01_sfnt_off000136a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A6 11772 bytes
SHA-256: 6e62abcc968f74e961784da2d38372302cb1a11ef4bc168ec29ac4a1bf3f3bdf
font_02_sfnt_off00015eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EB0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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