Malicious PDF — malware analysis report

Static analysis result for SHA-256 0675c22c1a14697a…

MALICIOUS

PDF

102.7 KB Created: 2021-06-13 02:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c09d2239637218b4a2cf0fc800237fa0 SHA-1: cc41859935a8c3635b78bb101907880431960bc2 SHA-256: 0675c22c1a14697a4ffa0c0f914c888248a5d910ce8dd720816c6e70954bee27
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The document contains a large number of embedded links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://smidgel.ru/pbw?utm_term=mount+and+blade+sex+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401714/normal_6064fa8aef330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414352/normal_6037433bbc567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_6064b89419d68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503525/normal_60534bfed418e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_604b8cb539c13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413474/normal_60206d7720e2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465537/normal_5fdeafc7b94ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_602d392f48c61.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4501484/normal_60b0fd1812ba1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://menovokosi.pbworks.com/w/file/fetch/144926121/convert_apk_file_to_online_free.pdfIn PDF document text
    • http://jivevisubido.pbworks.com/f/what_do_you_mean_by_direct_tax_and_indirect_tax._explain_its_features.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/w/file/fetch/144426105/allied_universal_ehub_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c34e11ed-6885-4720-bde2-805aea3e2f8e/fios_tv_remote_will_not_change_channels.pdfIn PDF document text
    • http://suniger.pbworks.com/w/file/fetch/144570744/69619101187.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/f/gta_trk_city_v3_apk_indir.pdfIn PDF document text
    • http://gitefov.pbworks.com/f/possessive_adjective_worksheet_grade_2.pdfIn PDF document text
    • http://gutupum.pbworks.com/f/descargar_geometry_dash_uptodown_para_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9917de87-7c40-45d3-ac9d-7ac52b8637c3/wushu_china_wing_chun_kung_fu_training_equipment.pdfIn PDF document text
    • http://piwomimagito.pbworks.com/f/85511075650.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14998 5088 bytes
SHA-256: 600f94ab8c79c8bdf1b68e633a93a306b56b49cc0428c9886bdbdb3c7830d6f4
font_01_sfnt_off00015ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AE0 17512 bytes
SHA-256: 249b5c8d26af7a314c917820d589a3b76b2245817e9ac6165af7a0764a29b370

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