Malicious PDF — malware analysis report

Static analysis result for SHA-256 be719eac9c8df638…

MALICIOUS

PDF

78.8 KB Created: 2020-11-21 11:24:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65bdae5fba64d4175b8782dbf01ca08a SHA-1: 79e4154d2c61b1fd22c6794ee617ef62410bf2cd SHA-256: be719eac9c8df638ed5e816f511034f1f5b1807ffc3279ca4ffa9ce09b0b4c43
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external websites, identified as a link farm. One of these links, 'https://gettraff.ru/123?utm_term=odysseus+and+hades', is flagged as a known malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=odysseus+and+hades
    • https://luxexawasoju.weebly.com/uploads/1/3/4/1/134109261/fevag.pdf
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/320fbc976d2.pdf
    • https://sitixibabu.weebly.com/uploads/1/3/4/7/134749551/5798964.pdf
    • https://cdn-cms.f-static.net/uploads/4389394/normal_5fb2a109d8093.pdf
    • https://zuxaminuxux.weebly.com/uploads/1/3/4/6/134652083/kowurowosamixo_tezawivogitavi.pdf
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5f9f623d9d8b0.pdf
    • https://gebulofafilo.weebly.com/uploads/1/3/4/7/134717894/dupije_zogela_xiramaram.pdf
    • https://cdn-cms.f-static.net/uploads/4421473/normal_5faa72e817d62.pdf
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5f9e3cceceeb1.pdf
    • https://kepudeveru.weebly.com/uploads/1/3/4/6/134698703/zazipewozebadidux.pdf
    • https://cdn-cms.f-static.net/uploads/4405186/normal_5f9d773f56733.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f91282e6-a4d2-4536-9d85-c4865bd2623e/62295672713.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f074.bin
62c91db759599761e8b2084bda4c7dea529c8a2a21a34d1081c3ac1427ad37cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF074 4912 bytes
font_01_sfnt_off0001012e.bin
e7ebf6cefb1e186aee6a6dc12a18a02d4737c711f5c560d02349e044bcc1c22d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1012E 14384 bytes