Malicious PDF — malware analysis report

Static analysis result for SHA-256 467c30762b629019…

MALICIOUS

PDF

92.0 KB Created: 2021-03-14 12:10:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 29bb22c53f1ddc2861e3b6c1c97db8e1 SHA-1: ec1fe85134c1d4fa7791eada2a5a745e38b102e1 SHA-256: 467c30762b629019b194d40006427614d3fa4e73f684ad8b18195f64250e829c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://nipisod.ru/award?keyword=despues+del+liberalismo+pdf PDF link annotation
    • https://mofagobebaz.weebly.com/uploads/1/3/4/6/134633285/9f45ba03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454973/normal_602cd762ec75d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5fda8579d81a1.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/Riiibif/68926323262.pdfIn PDF document text
    • http://levelupguild.com/23416253145qn558.pdfIn PDF document text
    • https://fanamavikere.weebly.com/uploads/1/3/4/6/134610997/rakikawunolot.pdfIn PDF document text
    • http://gouliwer.online/16517191391btj0w.pdfIn PDF document text
    • http://vknart.xyz/taligeze1r4si.pdfIn PDF document text
    • https://cdn.sqhk.co/kigoxeni/jbiaBjc/the_tiny_bang_story_premium_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_5fe6353f438e0.pdfIn PDF document text
    • http://mereravewesone.iblogger.org/wii_u_gamepad_play_without_tv.pdfIn PDF document text
    • http://tonagruz.ru/disawar_mein_aaj_ki_report_kya_haiwwjrr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381090/normal_5ff97051c646a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vomukosupes.rf.gd/46485488463.pdfIn PDF document text
    • http://wubonaxe.epizy.com/please_see_below_updated_information.pdfIn PDF document text
    • http://fetufebutegiv.rf.gd/biophysics_book_by_debajyoti_das.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/revuwofebasi.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/94198811573.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/tinatofit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1F 5024 bytes
SHA-256: d5fbe77041d5ae138323b9773f1cb406eda03f7281f49383e113dd57328465e2
font_01_sfnt_off00012d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2C 11712 bytes
SHA-256: ef3bd6606890ac8aceb844b498b6132438bcc05dc72c9f3a25c52f0006a0cd5e
font_02_sfnt_off00015374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15374 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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