Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee1e5b52bfee1b4…

MALICIOUS

PDF

73.3 KB Created: 2021-04-17 17:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dfc455f99566b83dea083233f2cfe120 SHA-1: 56afcfa1438b3c17874f1326e9c194f2dcfb1042 SHA-256: 7ee1e5b52bfee1b4ae1b1330a99b6fafb86509530e277a27d58b80ce40e37f00
126 Risk Score

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://maypoin.ru/strik?utm_term=how+long+do+you+cook+a+4lb+brisket+on+a+traeger PDF link annotation
    • https://cdn.sqhk.co/zogobadakedu/cYLDqhg/yellow_jacket_sting_dog.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/aGzgeRa/vokamoxalovolekorixurisi.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/GZibSjg/under_seat_storage_for_toyota_tundra_crewmax.pdfIn PDF document text
    • https://cdn.sqhk.co/konajera/maibDhb/hd_screen_recorder_for_pc_free.pdfIn PDF document text
    • http://zilitimo.getenjoyment.net/livros_sobre_antroposofia.pdfIn PDF document text
    • http://nitiwomifigurod.mygamesonline.org/22995067918.pdfIn PDF document text
    • http://itravelgr.com/the_giver_questions_chapters_1-23iv5b0.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/V0nfigd/vezasu.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/gdgfihm/mavosuvinopaxogedokabe.pdfIn PDF document text
    • http://jeseselanus.scienceontheweb.net/mergers_and_acquisitions_basics_all_you_need_to_know.pdfIn PDF document text
    • http://misstourist.info/best_word_of_the_day_app_ioszai5d.pdfIn PDF document text
    • http://legendarycraft.ru/abel_italic_font_free0v2od.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/jjbSjiP/64355701750.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/bgfihd3/how_to_say_pencil_pouch_in_french.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/jodabiladezot/41508603831.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/how_to_use_mendeley_to_cite_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/whatsapp_plus_anti_ban_apk_latest_version.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_off0000e15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15E 5556 bytes
SHA-256: cb646cb4e710492adb7cf39db1eea416eb502b8f7429131381ad255153952f58
font_01_sfnt_off0000f47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 10244 bytes
SHA-256: eb6126851e726b5cfdfa40c749dd8a59fc15d9ada5663538ac59bbe645ad131f

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