Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca4e4c21b51cb69…

MALICIOUS

PDF

129.0 KB Created: 2020-12-19 11:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c1be4e0527a0a7756669103c02852c35 SHA-1: 1ab5d08ccd9a7a19f374435e760b819f69b44003 SHA-256: 7ca4e4c21b51cb69e0719503ad51f5c032683ab83f2660b8cd9ec655a9da7283
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external links, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://traffnew.ru/strik?utm_term=the+prophet+kahlil+gibran+pdf+free PDF link annotation
    • https://zanobuxukopul.weebly.com/uploads/1/3/4/6/134678616/govod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5f938ce618209.pdfIn PDF document text
    • https://wodorolijuzawex.weebly.com/uploads/1/3/4/7/134770742/0c251829e434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_5fd32eee5fad9.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/3730909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5f978d0c8708b.pdfIn PDF document text
    • https://rejudizik.weebly.com/uploads/1/3/4/7/134701546/0e549.pdfIn PDF document text
    • https://vukegodepobaxi.weebly.com/uploads/1/3/4/6/134676750/9250178.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a01c0f-8c52-4916-a732-02bfd892acc3/kiwakovukodusidopuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2eaadd-08ec-44c2-8937-02fa9068fa20/knockin_on_heavens_door_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06009e3-fd2d-4317-8690-83a37e87cd70/19933183510.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_off0001bd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD6E 5280 bytes
SHA-256: de5bb9dc120b46d094e9e5c947d9c7382318512af981f3de2d29b6805712bb9e
font_01_sfnt_off0001cf58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF58 11724 bytes
SHA-256: 3afb143d7be1f1dcb64f613e6b2592d5d82227b22f8fc8a7e2259630e52833a4