Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1e8f0467434e80…

MALICIOUS

PDF

74.4 KB Created: 2021-01-06 15:52:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e01148062bd6a5fbf01e76fcfe5ba67b SHA-1: e9a7189f55fc4863616944fbe2b76364c15d12fd SHA-256: 7b1e8f0467434e80fe2a345f548363d286db000295c4bec99cdffc45efe026fd
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/123?utm_term=forward+start+option+pricing In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5fb81e78349b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_5f8f13bfc2256.pdfIn PDF document text
    • https://ramojiri.weebly.com/uploads/1/3/4/4/134443871/c7390c54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f93fc40eec83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408879/normal_5fbcf8dbf0b85.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/8e80309c-70b2-4636-8884-48bcd6484327/cooper_river_park_bike_trail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e89524a-5078-4ea0-8412-559df7e6410e/koser.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/darkness_of_hallowvale_quest_guide_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/what_is_burbur_pinella.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e343462-e146-448e-8c5e-e2f7542b42e9/epic_battle_simulator_2_indir_pc.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_off0000e38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 5256 bytes
SHA-256: 131644249bf5724dd8a0f4ca65e323149b2bbc3f6ce4fc8d273184f7085eb0fc
font_01_sfnt_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 11728 bytes
SHA-256: 79d40fcebd10452fcec162f1c6102704e76d4fd914a6c805d115117bc2552aac