Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d7fde32d9fc891…

MALICIOUS

PDF

82.2 KB Created: 2021-03-08 12:55:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 921497ff62f54bc62f81f6c314e5b048 SHA-1: b8746350e66065a799f2b0a81d5fb9e52ccb3867 SHA-256: 29d7fde32d9fc8911ab27dca4ae7e17d62523c9a79af84945e71ddca2e3f97d0
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. 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 heuristic firings point towards techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://kuzutuzo.ru/award?keyword=arquitectura+bioclimatica+en+mexico+pdf PDF link annotation
    • https://zuretajobujab.weebly.com/uploads/1/3/1/4/131483148/8d7de079b2b5eb9.pdfIn PDF document text
    • http://lonagonem.22web.org/body_planes_and_directional_terms_worksheet_answers.pdfIn PDF document text
    • https://jevefelenop.weebly.com/uploads/1/3/0/7/130775498/22f8d036.pdfIn PDF document text
    • http://tafasizogir.22web.org/biriti.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/YgeGgdF/51769230680.pdfIn PDF document text
    • https://cdn.sqhk.co/titukopano/ThfVKhe/soundboard_among_us_mp3_download.pdfIn PDF document text
    • https://terunutu.weebly.com/uploads/1/3/5/3/135319236/vuwogemevut.pdfIn PDF document text
    • https://raralulewuk.weebly.com/uploads/1/3/4/4/134478892/7794092.pdfIn PDF document text
    • http://gelumagiz.iblogger.org/someone_like_you_lyrics_and_chords_eric_clapton.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/Z4bjijh/tinadosagugaladum.pdfIn PDF document text
    • http://telewapor.22web.org/pijekalurimesedewawu.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/ghhjjdX/19601690056.pdfIn PDF document text
    • http://zozomerolam.22web.org/destination_b1_free.pdfIn PDF document text
    • http://nimolebefiv.22web.org/61226042667.pdfIn PDF document text
    • http://vogeposekuxav.66ghz.com/multiple_intelligences_developmental_assessment_scales_midas_questionnaire.pdfIn PDF document text
    • https://cdn.sqhk.co/kufejagefep/s8jevbk/94725296316.pdfIn PDF document text
    • http://vulifux.66ghz.com/vizio_m43-c1_remote_app.pdfIn PDF document text
    • https://dewajijivixire.weebly.com/uploads/1/3/4/6/134638152/susuz.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://vatekovinewuwa.epizy.com/bevibusadalipevenezizor.pdfIn PDF document text
    • http://moretavumafoge.epizy.com/accp_pulmonary_embolism_guidelines_2016.pdfIn PDF document text
    • http://niruduzef.epizy.com/ladobunusaro.pdfIn PDF document text
    • http://pikakodi.rf.gd/maloxevopozazanezemefi.pdfIn PDF document text
    • http://talaxevavilur.rf.gd/how_to_prepare_for_organic_chem.pdfIn PDF document text
    • http://davutawopoban.epizy.com/cannibal_holocaust_full_movie_sub_indo.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_off0000f3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E9 5328 bytes
SHA-256: 53903033b947eb09105f8c2f58dadeff2f3fdcba85409e4d31c3ce09ad15785f
font_01_sfnt_off000105e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E5 11464 bytes
SHA-256: 8c7bc657dc672809c8a146fe51686537ed1e897ba840b8892e257042ecf46a18
font_02_sfnt_off00012b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B02 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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