Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9d2ae094c1eb00…

MALICIOUS

PDF

81.8 KB Created: 2021-01-18 00:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8a88833e486c016ae2a3c05734e87d5a SHA-1: 988225952d527534b9cf7d2ea9ab5019dbcfda58 SHA-256: ae9d2ae094c1eb00fdfa99fcf850993d46cd68b60eba207940e87ec583c4abc7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely used as a lure for initial access.

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://trafffi.ru/123?utm_term=white+mage+ff14+guide PDF link annotation
    • https://cdn.sqhk.co/lanabeja/RIjj1Re/valazewodarikapugudale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_5fba8018e81a0.pdfIn PDF document text
    • https://mewixaduzikizom.weebly.com/uploads/1/3/4/5/134594829/fezuwabonaka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368237/normal_5fed75c9d65c9.pdfIn PDF document text
    • http://vurenosul.22web.org/saguzonuxoludoje.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/gfjijjL/kofewaxujajuruzanosoduwu.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/Otof0ie/kung_fu_zombie_movies.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/luvegarogizusuxukab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415951/normal_6002c6a20700f.pdfIn PDF document text
    • https://sibovobum.weebly.com/uploads/1/3/4/8/134879451/kesixikibudabinebe.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/luzalavakudito.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bumilamufitilu.epizy.com/bd_facsaria_fusion_manual.pdfIn PDF document text
    • http://vejabimumen.epizy.com/search_engine_optimization_google.pdfIn PDF document text
    • http://dulaxidej.epizy.com/73504030309.pdfIn PDF document text
    • http://zebigibozudival.epizy.com/lady_folding_fitted_sheet_funny.pdfIn PDF document text
    • http://merizipu.rf.gd/diagnostico_de_salud_comunitario.pdfIn PDF document text
    • http://tereralubo.epizy.com/50855697449.pdfIn PDF document text
    • http://suvoxezol.rf.gd/mefazixasokiba.pdfIn PDF document text
    • http://lagadasisipas.rf.gd/9306887870.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_off000103ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AE 5168 bytes
SHA-256: 1b496809df336abfe701a95906984fb7fd40e3316cdfcc4972f0dd076da9b5f5
font_01_sfnt_off0001153c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153C 10948 bytes
SHA-256: f934fd83c0feed8337b740acecbf7cc6604dc0be2257e23e83262db66de5bc94

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