Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c585d4e4a68dba3…

MALICIOUS

PDF

76.1 KB Created: 2021-03-16 17:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bad35870dbafe4e5eb68c4254398a95d SHA-1: 310c3adc93c588c1599bb292d2602701e573439b SHA-256: 6c585d4e4a68dba38f760e7f238c44bc947d965bb55e3c0ec411197b3cf1bff0
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/wix?keyword=ff3+1.2.3+mod+apk
    • http://ronifibofizet.medianewsonline.com/newiwanevipamonuvepod.pdf
    • https://static.s123-cdn-static.com/uploads/4460944/normal_5ff5781220528.pdf
    • https://static.s123-cdn-static.com/uploads/4448985/normal_5fcbb2b527cf8.pdf
    • https://cdn.sqhk.co/zezetemirag/ahhheib/nuxiwogonave.pdf
    • https://cdn.sqhk.co/kukisigafumi/jbgjl6L/sexonubi.pdf
    • http://fisijowizaraxot.iblogger.org/manual_capsule_blister_packing_machine.pdf
    • http://conicppjry.bid/waste_management_scandal_19980b8ny.pdf
    • http://stnold.com/4563254089kh8j6.pdf
    • https://cdn-cms.f-static.net/uploads/4425009/normal_5fdbc8877fcdd.pdf
    • https://cdn.sqhk.co/wixexozesila/zibhcjf/zifajanidedawikepija.pdf
    • http://wizapivizesib.mygamesonline.org/96536810743.pdf
    • http://nebofimanigi.sportsontheweb.net/when_you_wish_upon_a_star_chords_easy.pdf
    • https://cdn.sqhk.co/virurewev/fd6UjdR/12920613522.pdf
    • http://devivitonewe.sportsontheweb.net/22663304073.pdf
    • https://cdn-cms.f-static.net/uploads/4449789/normal_6012fda83c149.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://warevaxuderisi.rf.gd/petty_cash_log_templates.pdf
    • http://wobowix.rf.gd/bsc_chemistry_1st_year_question_papers_2020.pdf
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_633eb5cf37444bff97c1520f8fd14449.pdf?index=true
    • https://39472683-7d43-4bc3-882b-0947a83fd973.filesusr.com/ugd/544c7e_ea60c9b571e7440786aa902e19b09a7c.pdf?index=true
    • http://vesedakowata.onlinewebshop.net/74643149761.pdf
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_e8096d9265ef4d3c91421ca47c87b474.pdf?index=true
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_b0c2f139279c4bffa217329eb8e14424.pdf?index=true
    • http://sajekitix.rf.gd/most_tough_interview_questions_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eafc.bin
2da07749b21f6cc743eeebe9368296bf07a7784b3df147484cba64af47c3a44f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 5280 bytes
font_01_sfnt_off0000fcfd.bin
e1b2291f135c2d5af94cae255eba05ea582af3c207f3aa39424963a75b97a304		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFD 11052 bytes

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