Malicious PDF — malware analysis report

Static analysis result for SHA-256 4841e76780b2a8de…

MALICIOUS

PDF

67.6 KB Created: 2021-02-08 04:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 63f21b4dd385b0b8af66fcb3fc88d451 SHA-1: e291d6bc168d73c142e759fbd5db1efb4f0686c8 SHA-256: 4841e76780b2a8de9f65345ae584ae8895181d5f97fe2f0b40804b763214b6a9
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this is a malicious attempt to distribute content or malware. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the primary attack pattern involves directing users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8462

Heuristics 5

  • 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 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.
  • 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
  • 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://bologen.ru/aws?utm_term=tom+odell+another+love+piano+sheet+music PDF link annotation
    • http://qwonder.space/newugigalubl0x1.pdfIn PDF document text
    • https://bosizeke.weebly.com/uploads/1/3/4/5/134596703/6753025.pdfIn PDF document text
    • https://zofoxutugutijor.weebly.com/uploads/1/3/0/8/130874595/gukidajeba_bikediberel_kebexazufotaz_kogeg.pdfIn PDF document text
    • https://zibubelufi.weebly.com/uploads/1/3/4/5/134517595/1493798.pdfIn PDF document text
    • http://mon-cmbretagne.best/46590951367p01f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5ff29d21b94f7.pdfIn PDF document text
    • https://karopudalel.weebly.com/uploads/1/3/4/8/134881347/mokoxuga_rezezilo_pazuvadiz.pdfIn PDF document text
    • http://netewe9.xyz/iptv_android_box_irelandst18j.pdfIn PDF document text
    • https://kegozogoro.weebly.com/uploads/1/3/4/5/134525602/misir-xavixokeloj-turuke.pdfIn PDF document text
    • https://wobifeda.weebly.com/uploads/1/3/1/0/131070490/2750275.pdfIn PDF document text
    • http://supernefritroller.xyz/grade_9_maths_exam_papers_and_answers8w7gt.pdfIn PDF document text
    • https://dolilufaxeni.weebly.com/uploads/1/3/2/6/132683246/135a0eeb501.pdfIn PDF document text
    • http://urolog.xyz/washington_hockey_resultstlonr.pdfIn PDF document text
    • https://roxowuvunesoneb.weebly.com/uploads/1/3/4/8/134889799/jajof_dowoxuv_vujazirivugubak_xozipemuboku.pdfIn PDF document text
    • https://tarezusubem.weebly.com/uploads/1/3/5/3/135386237/5392774.pdfIn PDF document text
    • https://fomodefoz.weebly.com/uploads/1/3/5/9/135958111/manovolurifajab.pdfIn PDF document text
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/gokemokavo-gararumapek.pdfIn PDF document text
    • http://sayseedokg.com/free_download_games_cooking_dash_3_full_versionq0x77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46C 5324 bytes
SHA-256: 1f0d890ef6ef8b79c69c80b9bb908b915811ee45a1a2c43392ff6d93027cb13f

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