Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59c14a4091200c8…

MALICIOUS

PDF

69.6 KB Created: 2020-11-18 23:22:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5204983fd81623ea49093e8ad32745ac SHA-1: d5647a4a268d824ad7684a8a8544daa8c00ab681 SHA-256: a59c14a4091200c8f9e8705a95b7fcdfe320868fb0c11f430e9ba8e9b47efb8d
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The embedded URL points to a suspicious domain, suggesting an attempt to redirect the user to a malicious site. No scripts were extracted, but the PDF structure and embedded URI indicate a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=dragon+age+origins+reaver
    • https://cdn-cms.f-static.net/uploads/4365549/normal_5f884a7517b41.pdf
    • https://cdn-cms.f-static.net/uploads/4419437/normal_5f9e4e8d2ae19.pdf
    • https://cdn-cms.f-static.net/uploads/4426059/normal_5fa8510ec8234.pdf
    • https://cdn-cms.f-static.net/uploads/4383791/normal_5f98d41a8fe85.pdf
    • https://cdn-cms.f-static.net/uploads/4379362/normal_5f9a968cdde53.pdf
    • https://cdn-cms.f-static.net/uploads/4380395/normal_5f8e06511acd1.pdf
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5f8e39ab67bf5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bubeto/14755045552.pdf
    • https://s3.amazonaws.com/ganubifirigevi/lugamuvewogipemupi.pdf
    • https://s3.amazonaws.com/tesasubawalozan/vuwumikukozebi.pdf
    • https://s3.amazonaws.com/vizegemawokaxe/carpentry_lessons.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/nccn_guidelines_for_patients_lung_cancer_screening.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_off0000d515.bin
2505904f51c970237d63da9390550f1a01951435766ee2a2e65b974fb08d29d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD515 4880 bytes
font_01_sfnt_off0000e5ca.bin
3baa90cbf3e16a3a92165c767cc614131d1fcdce2b2602ab395b4ce263c46200		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CA 10444 bytes

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