Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3847515a26b745…

MALICIOUS

PDF

85.3 KB Created: 2021-01-06 20:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4111d5a8ebf0c8808611179a2fa5c233 SHA-1: 1e039dc745ae01a051b259695303b04a55698dc8 SHA-256: 6e3847515a26b745800d13f7084401883fb70f8f45ec802c63666ceace511638
186 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 phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation designed to redirect users to malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's primary purpose is to drive traffic to these external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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
  • 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://trafffi.ru/123?utm_term=coleman+8+person+instant+tent+takedown PDF link annotation
    • https://cdn.sqhk.co/majumoros/9igOja0/19879786542.pdfIn PDF document text
    • https://jagozuru.weebly.com/uploads/1/3/4/3/134360529/zuxolugutezisijixubi.pdfIn PDF document text
    • https://verikadofaja.weebly.com/uploads/1/3/2/3/132303102/4407159.pdfIn PDF document text
    • https://cdn.sqhk.co/lukupupiba/Mcd2lgg/viking_battle_for_asgard_xbox_360_rgh.pdfIn PDF document text
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/a41fbcb56fd7.pdfIn PDF document text
    • https://cdn.sqhk.co/likafupat/Iibw4xA/25831831322.pdfIn PDF document text
    • https://lukavorewigi.weebly.com/uploads/1/3/4/8/134862497/lorir.pdfIn PDF document text
    • https://wiwokuvivatazu.weebly.com/uploads/1/3/4/6/134629214/ecfb1.pdfIn PDF document text
    • https://dekedenavit.weebly.com/uploads/1/3/4/6/134612093/33d75e5.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/9816020.pdfIn PDF document text
    • https://gaxadujabe.weebly.com/uploads/1/3/0/7/130775632/mosolaputusalater.pdfIn PDF document text
    • https://cdn.sqhk.co/meradipuwiz/8getify/on_my_own_ashes_remain_lyrics_deutsch.pdfIn PDF document text
    • https://lodokevez.weebly.com/uploads/1/3/4/4/134476034/wesadepaxowut.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/kudefem/ctet_answer_key_2019_paper_1_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF813 5360 bytes
SHA-256: d85d4e349242c42317f2dccb29cc6eef3b9d56ce0c1fdc126d03523dd4198da6
font_01_sfnt_off00010a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3B 11004 bytes
SHA-256: eea95ed53b96ea42961ccf52db92a7c028efb3d53a3f1231642d40daf5c4bacd
font_02_sfnt_off00013007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13007 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36

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