Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa92d588d8fbb1e6…

MALICIOUS

PDF

66.0 KB Created: 2020-12-09 12:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 23b4fa00e5ffd6bf15e447573f2e7dcb SHA-1: cbe38a77a8f814ac6dc33bc28c87ea2fe2913bb3 SHA-256: aa92d588d8fbb1e66222f8d47b5219f6aa18b2f82c2d1aca4b0ae54b49158bd9
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'link farm' by heuristics. One of the primary URLs, 'https://trafffe.ru/123?utm_term=genesis+v2900+tire+size', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests an attempt to redirect users to malicious 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 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://trafffe.ru/123?utm_term=genesis+v2900+tire+size PDF link annotation
    • https://wusafasugulub.weebly.com/uploads/1/3/4/5/134586051/3329967.pdfIn PDF document text
    • https://zuzagidebosoxe.weebly.com/uploads/1/3/4/3/134391670/e1a097c452d2.pdfIn PDF document text
    • https://saxepuxuk.weebly.com/uploads/1/3/4/4/134472003/9509896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_5fa79f15b16ad.pdfIn PDF document text
    • https://tizupokewa.weebly.com/uploads/1/3/4/0/134013062/3550975.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/monujetepagelekakax.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/5007536.pdfIn PDF document text
    • https://nokiziwevapof.weebly.com/uploads/1/3/4/5/134507241/fdced2e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/rojatixipipup.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/aplikasi_mandiri_e_cash_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/webilesilugosaratawenena.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/voluntary_migration_aphg.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/assassin_s_creed_rebellion_character_guide.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_off0000c771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC771 5008 bytes
SHA-256: f1e92ceb04ac0aca5ff6e978c1a56e8c803a549c9f529cad0eb80c297fb408aa
font_01_sfnt_off0000d89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89C 10252 bytes
SHA-256: 554d839eb1a7a7efb895933c0393a30af85547b86a3ad3c649091bb318c85f6d

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