Malicious PDF — malware analysis report

Static analysis result for SHA-256 942b47f5a56cff61…

MALICIOUS

PDF

120.4 KB Created: 2021-03-24 07:06:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 677631c012298ac3b18d73a4a1b6768c SHA-1: 5158f7dbb91edfb7b693fc450f1cf2f270692804 SHA-256: 942b47f5a56cff612428d706a833d16c122a40943e166902801536943b6b9bdf
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its use of a link farm technique, embedding numerous external links disguised as relevant content. The primary URL, 'https://soxebez.ru/award?keyword=aeneid+book+pdf', suggests a phishing or scam attempt by directing users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=aeneid+book+pdf
    • https://cdn.sqhk.co/disidudi/fzqkieJ/wire_rope_cut_to_length_machine.pdf
    • http://cardioactiveufficiale.site/49552950388qgaz3.pdf
    • https://cdn.sqhk.co/wakivunet/gehihan/fill_color_in_excel_using_python.pdf
    • https://cdn.sqhk.co/wumerelup/eUs7gh9/74403928740.pdf
    • https://cdn.sqhk.co/rapovebakeb/ibgh6Nl/47364447328.pdf
    • https://cdn.sqhk.co/didatife/ibgeSgd/download_total_conquest_mod_apk_unlimited_tokens_offline.pdf
    • https://cdn.sqhk.co/lisesemafo/fpzgcib/diabetes_mellitus_management_guidelines_2017.pdf
    • https://cdn.sqhk.co/setawefuwo/gjG7Zgi/android_remove_google_assistant_screen.pdf
    • http://kanotisutujag.iblogger.org/bitupezu.pdf
    • http://phtech.site/do_i_watch_fma_or_fmab_firstmq9v7.pdf
    • http://1xbet-regi.site/nfl_personal_conduct_policy_suspensionsvs2jl.pdf
    • https://cdn.sqhk.co/nobutowug/gcgjhby/65240654411.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jinotugiwomo/4906781125.pdf
    • http://luxetejafolakem.rf.gd/vewuziveliwobafil.pdf
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_0a723e684ec94f8abd58a35f03827f2a.pdf?index=true
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_048dd7fffdb144b3ba368734c44d2f09.pdf?index=true
    • https://s3.amazonaws.com/viboxikuz/34164750367.pdf
    • https://s3.amazonaws.com/bikikanafopavu/apsa_citation_guide_purdue_owl.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_off00019542.bin
e047fe196e8130b43043b1597524dce46c1a15063986bb251c72b984b64a9b58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19542 4712 bytes
font_01_sfnt_off0001a562.bin
197d07faf44b63a3656c85b36685112f9e4bc7b9901e4d3191ced7814daaabbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A562 14692 bytes

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