Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20976a80f4e4d48…

MALICIOUS

PDF

76.6 KB Created: 2021-03-03 21:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 154971a9e5f47ff7b4e6c5283f029b29 SHA-1: 2e5d32613d953a3885e84e59b3b20bc2d9e13e9a SHA-256: e20976a80f4e4d484477821512cb4c80599b476907ae7e2677127bf63a1e2749
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://soxebez.ru/award?keyword=club+car+48v+charger+not+working PDF link annotation
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/f5852a8ad2d.pdfIn PDF document text
    • http://texoraw.sportsontheweb.net/monster_movie_soundtrack.pdfIn PDF document text
    • http://surisetufuna.iblogger.org/appendicitis_surgery_video.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/smart_calling_art_sobczak_free_download.pdfIn PDF document text
    • https://zogazipo.weebly.com/uploads/1/3/2/3/132303407/mufov_xobejo_zerafitibujin_fejuwuxipi.pdfIn PDF document text
    • https://vebipebetas.weebly.com/uploads/1/3/4/0/134012388/3e7d153bfb410a.pdfIn PDF document text
    • https://japapitamamevoj.weebly.com/uploads/1/3/2/7/132740309/davuzejuwuno.pdfIn PDF document text
    • https://foxogitasi.weebly.com/uploads/1/3/2/7/132740511/1c76474292ce206.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/xovekolamoxe/33267935418.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/7155971378.pdfIn PDF document text
    • http://fudewisukot.rf.gd/how_to_practice_portrait_photography.pdfIn PDF document text
    • http://wojegopuda.rf.gd/steam_mac_os_x_10._7._5.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_off0000f000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF000 5424 bytes
SHA-256: e142e547ad3b8a6bff58e3925d887a38298379f9d04ac8028ac72508f53dbf67
font_01_sfnt_off0001028a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028A 10196 bytes
SHA-256: 5e72b8fd953e5a1b50bae3ce87355d9d5c9bb4102ef7ebd55da4570a8f57c0e0

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