Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5279a5113fda72…

MALICIOUS

PDF

75.6 KB Created: 2020-11-24 07:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f5b74e836e0a20e0a5674ca84a9597eb SHA-1: e50be1406b53da7557d2e814f81eb0fece40e529 SHA-256: ac5279a5113fda7242436711c4767fe1913c6fb3df3b5c0426a952b78dbecc31
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URL heuristic point towards a phishing lure, likely using embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffine.ru/strik?utm_term=goblin+slayer+light+novel+read+online+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383791/normal_5fad94c4207ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_5fa150ab675ea.pdfIn PDF document text
    • https://sedidumorasu.weebly.com/uploads/1/3/4/5/134507492/sufodulun-runurika.pdfIn PDF document text
    • https://nuzilemuf.weebly.com/uploads/1/3/4/4/134479477/52bd2654a889.pdfIn PDF document text
    • https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/8861517.pdfIn PDF document text
    • https://nopiroradonumiw.weebly.com/uploads/1/3/4/4/134401961/f05e2639ebd83a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416660/normal_5fb5c04446dec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f871d7533b60.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/lorifumofelu/is_consecutive_interior_angles_congruent.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/don_t_answer_me_song.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/building_maintenance_management.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_off0000eae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE4 5500 bytes
SHA-256: 0cd672556601d7623cba06b6344c858795ceb8c02665fc7d15589962820fb19b
font_01_sfnt_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 10560 bytes
SHA-256: 21b4944f5fe7aba28defcdfd45f358f3673898e29f7a568de507902718d72178