Malicious PDF — malware analysis report

Static analysis result for SHA-256 926c180b9c418e86…

MALICIOUS

PDF

70.9 KB Created: 2021-03-26 05:37:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ea4a682ac7f2a68ba2ee27367c6648e9 SHA-1: 6ead943c5509794df9fcb7e7956956f01a6caad4 SHA-256: 926c180b9c418e862774547684888825168ae0ffa157b303cb653e9b6a5082a4
194 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, specifically a fake invoice or payment scam, as indicated by the 'SE_INVOICE_LURE' heuristic. It contains numerous external links, with one prominent URL being https://druttle.ru/wix?keyword=aplia+accounting+chapter+11+answers, suggesting an attempt to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the distribution of further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://druttle.ru/wix?keyword=aplia+accounting+chapter+11+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382617/normal_60385274612a5.pdfIn PDF document text
    • https://zifimegepero.weebly.com/uploads/1/3/4/6/134601706/81eeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466175/normal_604647a55b29e.pdfIn PDF document text
    • https://kabolonopatine.weebly.com/uploads/1/3/4/2/134265344/9593303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_603681a497b79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5fdc49935c7f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_6048484cd8e34.pdfIn PDF document text
    • https://kepigepejabuji.weebly.com/uploads/1/3/4/3/134315220/c3b5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383444/normal_604e1bcc2e5eb.pdfIn PDF document text
    • https://podogavefa.weebly.com/uploads/1/3/1/4/131438056/napapisuf-karivola-bajesojivafovu-zixefini.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383692/normal_6008fd2b642e2.pdfIn PDF document text
    • http://vipogomer.iblogger.org/bescherelle_grammaire_gratuit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391636/normal_5fc8e28ba5669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468571/normal_6002b0dbab801.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421473/normal_6003543f5fc96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5fea44ff5b4b2.pdfIn PDF document text
    • http://kprovk.xyz/21214591267i1rmu.pdfIn PDF document text
    • http://idealica-ituficiale.website/lavurorubelikerigq3q30.pdfIn PDF document text
    • https://kewesolatuveg.weebly.com/uploads/1/3/1/4/131452958/84a837570f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501514/normal_6009dce786102.pdfIn PDF document text
    • http://idealicacolumbia.site/14144948339ye1db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://segudufarus.epizy.com/85245644542.pdfIn PDF document text
    • http://dofadedivuxira.rf.gd/films_offline_netflix.pdfIn PDF document text
    • http://milibelibagusez.epizy.com/suden.pdfIn PDF document text
    • http://repogadobuwiri.epizy.com/bagidugegusutekenoti.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_off0000d415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD415 5328 bytes
SHA-256: a950a74e789f20605f54a917a8126a597bff1b62859f5fd3642bb3b06744da9c
font_01_sfnt_off0000e645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE645 11220 bytes
SHA-256: 0eccc5195e3e2f8ec5d166e4dea19fb5d18d0a3c8550820e3c0e9df25c8a2d2d