Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d973c152e5d3d9…

MALICIOUS

PDF

82.0 KB Created: 2021-01-04 20:05:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 523e84756d0a203373c8f29f32052952 SHA-1: d1110f24b0e07ac013fcbfa62db74d68afd5956c SHA-256: e4d973c152e5d3d90dd17c880bc791607908f6bfa8aa6ebe5f7fc7075dad463f
124 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. The presence of 'SE_INVOICE_LURE' and 'SE_CALLBACK_LURE' heuristics suggests a phishing or scam attempt. The embedded URL 'https://trafffe.ru/aws?utm_term=cidco+lottery+result+pdf+taloja' is likely the malicious payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=cidco+lottery+result+pdf+taloja
    • https://static.s123-cdn-static.com/uploads/4392862/normal_5fdebcb6ae1f3.pdf
    • https://static.s123-cdn-static.com/uploads/4471960/normal_5ff0e8e47c5d0.pdf
    • https://static.s123-cdn-static.com/uploads/4454819/normal_5ff192902e7ae.pdf
    • https://cdn.sqhk.co/vakanaju/U21eaVN/map_of_hypixel_skyblock_hub.pdf
    • https://static.s123-cdn-static.com/uploads/4478383/normal_5ff0ecb8beabd.pdf
    • https://cdn-cms.f-static.net/uploads/4392667/normal_5fa1f858193e8.pdf
    • https://cdn-cms.f-static.net/uploads/4406228/normal_5fd7cd848ea1b.pdf
    • https://static.s123-cdn-static.com/uploads/4413702/normal_5fc3e01a3dad7.pdf
    • https://cdn-cms.f-static.net/uploads/4443356/normal_5fa8253f28562.pdf
    • https://static.s123-cdn-static.com/uploads/4366660/normal_5fe3860d48395.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/90253956-8842-4b84-8940-e9d5867c4b6e/kotokiw.pdf
    • https://uploads.strikinglycdn.com/files/8110eed9-2ce3-41da-9c6b-a98b6e9a7b48/coc_mod_apk_download_uptodown.pdf
    • https://uploads.strikinglycdn.com/files/a7004774-0b4b-4f98-a34f-79d98043a45b/wow_vanilla_priest_healing_guide.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_off0000f22c.bin
ad6fd5c816f7e95a53118fd9096e2d9d0c1f9c5b187244ab8e290f7b0be76b05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF22C 5232 bytes
font_01_sfnt_off00010412.bin
77a446e6d9361d9a88bb20d7d25e1491fd5aad028910a9ec0fe8b75501133650		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10412 10980 bytes
font_02_sfnt_off000129e8.bin
4341f37a5e844297f4cc91acce0d3ca935500323926851a6b068368d44aed054		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129E8 4508 bytes

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