Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e97633f93a2fab…

MALICIOUS

PDF

74.6 KB Created: 2020-12-27 03:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: caecf4b644f655c9d3945f4e6212f867 SHA-1: d7ed626e86c2344df5a6cf7c1d9dd9b2f61d7fc8 SHA-256: 14e97633f93a2fab0e7bd5714b5b67c68548d88347f1545e0af048a13622c028
176 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a phishing or malicious content delivery mechanism. It contains a malformed stream and numerous embedded URLs, including one pointing to 'traffnew.ru', suggesting an attempt to redirect the user to a malicious site. The presence of a large number of external PDF links also indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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=multicraft%253F+build+and+mine%253F PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499673/normal_5fbe207b943b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424645/normal_5fc7271766f8d.pdfIn PDF document text
    • https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/6537787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_5f9fd7b99c69d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414866/normal_5fbafeff51e2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388813/normal_5fc75037653d8.pdfIn PDF document text
    • https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/0380db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5f9abcc6aa155.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472501/normal_5fddafa00a2ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f9191f449a38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f874e3b50103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484636/normal_5fc40a4542048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417648/normal_5f96341ad64af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502563/normal_5fd333b59fefe.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/cb0ab149-8969-4361-854e-f413bb82f9e1/shelby_county_tn_schools_spring_break_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB26 5276 bytes
SHA-256: 6fe2d95e9cd960206199d88b2028c15dcafee4d246299e510d749702791fe7aa
font_01_sfnt_off0000ed01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED01 1936 bytes
SHA-256: cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d
font_02_sfnt_off0000f640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF640 10876 bytes
SHA-256: 7494c20da8b4770f668067f061250f3971ab787aa3bcf39813684bf5c61880fb

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