Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34a6a033804361f…

MALICIOUS

PDF

77.7 KB Created: 2021-01-31 11:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0727a35f7b8568fcafaa900b2c2389c6 SHA-1: 98cc5be41a771eb888c25380971eaed74b261f59 SHA-256: e34a6a033804361fa579e6ecea1021848895492dc7eb2beaf847c2d906d7f341
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a link farm, directing users to various PDF documents hosted on external domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive external linking suggest it's designed to redirect users to malicious content.

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 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.
  • 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://jottigo.ru/aws?utm_term=maya+3d+animation+software PDF link annotation
    • https://cdn.sqhk.co/metexemoraga/a47RKR1/82570131064.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/FyFibjd/nipafiwivozoxopobiwopab.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/hQjfAhd/airport_city_weekend_code_facebook.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488580/normal_6008cf3dd2d6e.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/ibjcnhi/airthings_wave_plus_radon_accuracy.pdfIn PDF document text
    • https://cdn.sqhk.co/kitijorawul/ihoigic/vojibidularodikotopale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_60146ee295736.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/FoRgdFC/electric_guitar_chords_for_beginners_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/gc1xgiX/zofazaroverenibakideto.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/d6idGOn/colour_hole_3d_game_download.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/2d404.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/fSidiaA/driving_school_2018_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/iffoGhh/47778916319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458833/normal_60089c0015a3a.pdfIn PDF document text
    • https://cdn.sqhk.co/jorawuge/hjgf5kY/moto_rider_3d_speed_highway_driving_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/filovixedalu/jcKGghL/td_bank_swift_code_queens_ny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_600b18e458051.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF022 5384 bytes
SHA-256: db9f6122abc6d5aa2bb9d8a4928d8923115b18a67644ce8052d70c85360b5822
font_01_sfnt_off00010283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10283 11396 bytes
SHA-256: 3e155d7075fbdd234a11cab01b65924e7ca9957e5f09a5c11ef6df87f56daf6d

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