Malicious PDF — malware analysis report

Static analysis result for SHA-256 f261b07390a86b7b…

MALICIOUS

PDF

73.2 KB Created: 2020-11-22 02:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 267384adee298bb1e102486e7e074c66 SHA-1: 42f2cbcc808426fb83b4e668c9f6af592d40ad48 SHA-256: f261b07390a86b7bb2d8f57fa659a55701d19e7df3fec0d230d7ff36de6d58d0
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://trafffi.ru/aws?utm_term=hitman+blood+money+full+game+setup', indicates a lure for pirated software, likely to deliver a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/aws?utm_term=hitman+blood+money+full+game+setup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449616/normal_5fa20b5d6443e.pdfIn PDF document text
    • https://luriwopowilexat.weebly.com/uploads/1/3/4/3/134338936/1dbc7b22116.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_5f9db6af3cb47.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/2edb5eb53c6.pdfIn PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/lofemogafupukopo.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/kavitokolezub/cambio_climatico_efectos.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/dementia_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/69963983481.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/jusovitenanevisixewapir.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/dirositezaxukesapeluwoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4828101b-9094-40e8-a2bf-72cba9c23b77/59560316769.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_off0000e13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13D 5468 bytes
SHA-256: 4635c202c256272629f64b20f5d8b1320d4e8992c5146ae85ab8cfa88703bd03
font_01_sfnt_off0000f3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C9 10632 bytes
SHA-256: 95c3399954c6bf7f06528466b900dd3462e21cb1bc1b97f3bfe7e48be2299df2