Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb2503bf9d9acfe…

MALICIOUS

PDF

86.4 KB Created: 2021-04-28 03:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bf107374cb8ca96e19210ba1336f9b77 SHA-1: 568c52b0c99758561cc557ae9a2325d56d913094 SHA-256: 3bb2503bf9d9acfe118a81ab37f570bb881727b4b22433a89d8aa20a2131f417
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 0.9998

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 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://zajinet.ru/strik?utm_term=how+to+play+gta+5+on+xbox+360 PDF link annotation
    • https://cdn.sqhk.co/zijopenuxafi/MidOGih/44818579153.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/a4qPiyz/driving_police_car_dream_meaning.pdfIn PDF document text
    • http://lamisorosasam.mywebcommunity.org/lezekapikiwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388612/normal_5ff777a99421a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_605940af319b6.pdfIn PDF document text
    • http://bukobaxaz.getenjoyment.net/what_are_the_steps_in_research_methodology.pdfIn PDF document text
    • http://lagulesuko.medianewsonline.com/85424339164.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373997/normal_5ffe66892b1e7.pdfIn PDF document text
    • http://xutexukoxobofi.mywebcommunity.org/4th_grade_math_challenge_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/gfijgfp/negegedanexojiwaton.pdfIn PDF document text
    • https://cdn.sqhk.co/dedomafub/UPOjftu/bofeluzatajamixumurav.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/KjcIWkO/hero_summoner_free_idle_game_codes.pdfIn PDF document text
    • http://gazajujana.mygamesonline.org/barron_clothing_catalogue_download.pdfIn PDF document text
    • http://penageli.getenjoyment.net/hp_officejet_pro_l7680_printhead_problem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lowuguja.myartsonline.com/ebook_budaya_organisasi.pdfIn PDF document text
    • https://94cb5446-44f7-499c-8ddd-8d9df3a2db3d.filesusr.com/ugd/9b9c26_6f560081016c47bfa1937dd7b20f4421.pdf?index=trueIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_b732946b0717450dbe102c06dafea4b3.pdf?index=trueIn PDF document text
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_48e7706168164d81a1a5e0576c3764ae.pdf?index=trueIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_71ebd95321954bc087bae30808ebad3a.pdf?index=trueIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_161b743d36a84447942695bc036394a7.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001133c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133C 5660 bytes
SHA-256: eed562661a80a39944591289c2a2028084328e072b639aa96dec1d5c25821e77
font_01_sfnt_off000126b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B6 11088 bytes
SHA-256: 5fd61fcd5b695be11a34df826296c138e33f8b87ddbd2f3c3131268b47b6c60a

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