Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76ce7ac92aad232…

MALICIOUS

PDF

68.7 KB Created: 2021-01-05 05:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8e362af68c43e166c1b91ae0f1567c38 SHA-1: b070ac23531f5f5b1761a1ab9de8cd57f90dd410 SHA-256: d76ce7ac92aad2324f6048e4ed6444fce183ce62f1e664f9e2ed8809bbf0384d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffe.ru', which is likely a malicious domain used for phishing or malware distribution. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing or social engineering attack.

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://trafffe.ru/aws?utm_term=stalk+scan+apk+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5fa111d29bfc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_5faefc2428575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372355/normal_5fe59e79cf82a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448124/normal_5fc53ea81e36b.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/QGQicgh/super_mega_worm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450721/normal_5fcf743d082c7.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/9a09733b-2069-4e3d-b2ce-4d1645eb1be4/networking_essentials_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d9deb8e-d3a7-4b11-8de7-271a2b5fd928/hotmail.com_sign_in_login_email.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0aca048-c40b-4e16-a8a2-965df044034e/betipexawapajen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f8f8a6-506d-4149-9042-73df3926bfd1/kitowopufoganitikedas.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/soxojalagunawukasatokepag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1a74f3-0250-4efd-bafd-d5b4dc26cece/zovuxepupadariked.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/watch_avenger_free_online_123.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/lijapolekajadudawowapoma.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_off0000d009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD009 5176 bytes
SHA-256: ff194317e00ef97f076e6044c4525e6455353c5895899a32af3afd07fc5ea436
font_01_sfnt_off0000e1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BA 10820 bytes
SHA-256: ce3868df93445b0e441f022e351f147b38d1f0e7d96baf58cdf2bec2515a9056

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