Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe521f3a2368667…

MALICIOUS

PDF

78.2 KB Created: 2021-04-06 07:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4d4ea2b297248de6cd9b0b6c73bad54e SHA-1: d490f22c088793b79fc5a9ea9685659137d5fca6 SHA-256: 8fe521f3a2368667768b8ca224165da3b25d7c9ae23bf071fa37cb599fd92608
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or scam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ponafet.ru/strik?utm_term=how+to+clean+washing+cycle PDF link annotation
    • http://vaxenovutejuzid.sportsontheweb.net/vakerejololelab.pdfIn PDF document text
    • http://botefedej.sportsontheweb.net/all_and_everything_beelzebub_s_tales_to_his_grandson.pdfIn PDF document text
    • http://lapiwudoxavov.scienceontheweb.net/89076454396.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/JjgigLD/ball_pass_3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_605c97b4a8a3a.pdfIn PDF document text
    • https://cdn.sqhk.co/kesavaki/gh5ibhe/55406650911.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/gigexibozuji.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/80453703550.pdfIn PDF document text
    • http://fiwisud.getenjoyment.net/best_book_to_learn_french_on_your_own.pdfIn PDF document text
    • https://xesilowavexaweg.weebly.com/uploads/1/3/4/2/134265648/nonal-webosawevig-rogowosodilipok.pdfIn PDF document text
    • http://berozabekep.sportsontheweb.net/business_informatics_notes.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/4499957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_5fdaabf35ab81.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/Jjegfgi/grist_house_facebook.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/a_prayer_for_owen_meany_sparknotes_chapter_4.pdfIn PDF document text
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/0aaf3ebbfa9.pdfIn PDF document text
    • https://kerejokav.weebly.com/uploads/1/3/1/6/131637695/pabepufodekokefubi.pdfIn PDF document text
    • http://larumutul.getenjoyment.net/business_process_analyst_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_6026f720d1cb5.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/dheatJ2/bubogolafuwawi.pdfIn PDF document text
    • https://gebomatera.weebly.com/uploads/1/3/5/3/135396668/xudivopixinutu.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/kizobesale.pdfIn PDF document text
    • http://naxajogilelog.medianewsonline.com/pakuzunedizebazikesas.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/my_smoke_detector_keeps_beeping_three_times.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuzopejorexa.onlinewebshop.net/60070582942.pdfIn PDF document text
    • http://jisunopesaluzi.atwebpages.com/bus_ticket_booking_system_project.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_off0000f562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF562 5120 bytes
SHA-256: 1ff1e844347cddee177669721f4eef04cff7f0eda5970653582580beef9f69fd
font_01_sfnt_off000106e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E9 10676 bytes
SHA-256: a37962a244060f5c8373d3e3838441cd621fdd92a43c25b21d74d68f9ce3c1cd

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