Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae15c3d1f7ae9730…

MALICIOUS

PDF

76.0 KB Created: 2021-01-05 02:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2b86e7e558e672743d7211e9cd4a7ce5 SHA-1: 812804c74b968f78f432330cc43ce9fabd46ea1f SHA-256: ae15c3d1f7ae973058a2ea290dcb678b99dab7c9d8a095824f2352916d8d7695
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'trafficel.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to appear as song lyrics, a common lure for phishing.

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
  • 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://trafficel.ru/123?utm_term=fat+bottomed+girl+song+lyrics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390371/normal_5fec5c69efcd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5ff13a484eaf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_5f8b71c394b53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501057/normal_5fbef09db2c5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_5fc12fb11fd7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_5fb385987b046.pdfIn PDF document text
    • https://cdn.sqhk.co/razulati/M0Hibhd/grandpad_reviews_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449397/normal_5fc77197696e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bipepezuwed/midedegelizumus.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/38719250585.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/8856380620.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/getiwapag.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_off0000dda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA7 5244 bytes
SHA-256: dd202f2cf9fec4133a5850d880e32ea306eddd9281ffea77d683398bd1be4872
font_01_sfnt_off0000ef69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF69 11020 bytes
SHA-256: 9a3cc01a88c96b2c368d4bb79088c5243b3cf0fd2f6e6779213632944200cada
font_02_sfnt_off000114ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e