Malicious PDF — malware analysis report

Static analysis result for SHA-256 94673fd788d9b652…

MALICIOUS

PDF

75.3 KB Created: 2021-06-10 02:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8fde40915ae627b94d72e71757174ffc SHA-1: cdfda81e643d9928cbad68089b2531866dbb38b7 SHA-256: 94673fd788d9b65260a02e161405e7bff2d5dd29a9f53e36bebe8a52817cde08
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable hosting services, designed to lure users into downloading a fake 'Gta 5 mobile game'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it functions as a downloader or redirector for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ketchas.ru/pbw?utm_term=gta+5+mobile+game+download+for+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487191/normal_60473c79e623d.pdfIn PDF document text
    • https://zemejinifuv.weebly.com/uploads/1/3/4/5/134577925/dutesinemapixed_lijap_birokaniwajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_605d90b53dfa2.pdfIn PDF document text
    • https://sonolinezib.weebly.com/uploads/1/3/0/8/130874018/f5c484b1.pdfIn PDF document text
    • https://riluvozig.weebly.com/uploads/1/3/4/3/134380056/duxijikixu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471091/normal_6033496b2c8c1.pdfIn PDF document text
    • https://saxesejidor.weebly.com/uploads/1/3/4/6/134694827/433e1.pdfIn PDF document text
    • https://zurowovilotupe.weebly.com/uploads/1/3/4/3/134329893/nazefekizevofa-vewivabivovav-tizoniro.pdfIn PDF document text
    • https://jigazukenu.weebly.com/uploads/1/3/5/9/135964778/naxotavav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5fd811d49265b.pdfIn PDF document text
    • https://bepizapumi.weebly.com/uploads/1/3/5/3/135349865/joxemejunuvofux.pdfIn PDF document text
    • https://pofisuxix.weebly.com/uploads/1/3/4/0/134016862/losilemupakubube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5fe95f610d373.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujupaw.pbworks.com/w/file/fetch/144565263/jawikawed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/974e7205-7e0e-4747-b7bf-b6f07918b343/53748211406.pdfIn PDF document text
    • http://gazoridixilu.pbworks.com/w/file/fetch/144918999/57076800610.pdfIn PDF document text
    • http://jamexapageku.pbworks.com/f/boater_exam_answers_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d147fbd-7158-4c56-92b0-7844783a3ff1/64677416585.pdfIn PDF document text
    • http://molitutolu.pbworks.com/w/file/fetch/144996744/84178796531.pdfIn PDF document text
    • http://sozevupegufi.pbworks.com/w/file/fetch/144937242/hello_neighbor_act_3_basement_shadow_man.pdfIn PDF document text
    • http://zisakupaxevu.pbworks.com/f/windows_10_pro_iso_highly_compressed.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/145000122/gcam_note_9_xiaomi.pdfIn PDF document text
    • http://nowefuro.pbworks.com/w/file/fetch/144596307/nofababakutobejuzumebez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da5399ee-d0b5-4bfa-85fe-ed895f4d37b4/zatawo.pdfIn PDF document text
    • http://zofurutatag.pbworks.com/w/file/fetch/144731082/71505425411.pdfIn PDF document text
    • http://wejojixi.pbworks.com/w/file/fetch/144424014/dedutuxinigudukalopezuze.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_off0000e947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE947 5436 bytes
SHA-256: d7039bacfc3e58a3fbe722779c7b860ee26f42c742a93f6e3aeb4e48511379b7
font_01_sfnt_off0000fbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCC 10424 bytes
SHA-256: acf4fd3c397fce21c9ac6efc2e81077a732b113688b7a303960f7a7414f5047c