Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a269df9203d2017…

MALICIOUS

PDF

84.7 KB Created: 2021-03-07 20:23:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ed2252db201b7981f02979ec4d137071 SHA-1: cf86f185153e07a4d806eb218880999b65befa56 SHA-256: 4a269df9203d201760168b877064971b1d1688c4032c7c61bcdabc9249b6a3aa
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=hay+day+hack+apk+download+latest+version PDF link annotation
    • https://cdn.sqhk.co/dowotovewi/ghevUih/6656378856.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/fafitujipe_xosoladur_xanuverur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5fe9ca0d57a2b.pdfIn PDF document text
    • https://cdn.sqhk.co/nugofonavuf/czHj827/mortal_kombat_11_ultimate_collector_s_edition_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_603a14ceb7b48.pdfIn PDF document text
    • http://mewudaguzexo.sportsontheweb.net/falifojimipaliwewaf.pdfIn PDF document text
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/xakagux.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/1157688.pdfIn PDF document text
    • http://tonukavugu.mygamesonline.org/how_hard_is_a_clep_exam.pdfIn PDF document text
    • http://pafowitowa.medianewsonline.com/30914515157.pdfIn PDF document text
    • https://dowazulipogopu.weebly.com/uploads/1/3/4/3/134322731/wotawomamab.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/MfFwieK/one_punch_man_3djuegos.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/gdjep10/kalebizexav.pdfIn PDF document text
    • http://pirojibanenuzi.getenjoyment.net/tozujoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5fea272602589.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408475/normal_5fe2d8792feb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485809/normal_5ff092e759503.pdfIn PDF document text
    • https://digagewopaloz.weebly.com/uploads/1/3/4/6/134634746/zepekezupazebuvupaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwivazud.onlinewebshop.net/lukevat.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_off00010e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E08 5440 bytes
SHA-256: 24816cc79a9d08693c17e5c12ea063055b78c6d6a77f3570d6b67e614a22fd61
font_01_sfnt_off000120a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A1 10668 bytes
SHA-256: 828a7fa31a784bdc9d05bc87a6c8bb9ff55c1bf8da103021729b48cafce86b17

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