Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef7af49db7b07a4f…

MALICIOUS

PDF

72.4 KB Created: 2020-12-22 11:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1c3843056fc0cd5310e43be8a60c9ac SHA-1: 78ba7d62ebc66a5d842d8df0d5de4efe6daa2270 SHA-256: ef7af49db7b07a4f23307d006244a17ec2aabd015c1928b2d92e4555d032bb7d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, likely intended for phishing or a scam. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it was generated by a tool rather than being a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://trafffi.ru/strik?utm_term=lock+screen+macbook+pro+touch+bar+shortcut
    • https://tovuwopisivid.weebly.com/uploads/1/3/4/6/134640328/xunowapena.pdf
    • https://doriruvoni.weebly.com/uploads/1/3/4/5/134585963/e9bd0a4.pdf
    • https://mogugadikawes.weebly.com/uploads/1/3/4/0/134096191/fumobuvodiwatem.pdf
    • https://static.s123-cdn-static.com/uploads/4381976/normal_5fc3b6dec6a8d.pdf
    • https://cdn-cms.f-static.net/uploads/4502563/normal_5fb75e8adaacf.pdf
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/4d9fbc34094.pdf
    • https://cdn-cms.f-static.net/uploads/4499309/normal_5fd7292a420c1.pdf
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/Copyright
    • http://www.typoland.com/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/315afdf7-be1f-4afc-a928-5ae0a5eff0db/novekip.pdf
    • https://static1.squarespace.com/static/5fe1557f12753a7f033a7859/t/5fe1b581c5e8614de8beedc5/1608627588387/wezowovilivetakelaf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfac.bin
8fa5fc47f1c4d577ade0a12cf104f8d2f5d8331d2d553a120b9eeba46afd7401		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAC 6168 bytes
font_01_sfnt_off0000df4e.bin
8d995e77f0fdb355c7832f9c065c18dd8a0240b8361921596e6514cba5c86048		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4E 5284 bytes
font_02_sfnt_off0000f11d.bin
f21f3172026bbc7640b3fda3c1b30a3bce3bac416df82482700591c535427de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF11D 10296 bytes

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