Malicious PDF — malware analysis report

Static analysis result for SHA-256 289b43d311600f67…

MALICIOUS

PDF

68.9 KB Created: 2020-11-18 03:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57115cb17266f1dd5f42e541b6f79211 SHA-1: 75bc372953da79eedcb0dcf1b2d1ed38463cc86c SHA-256: 289b43d311600f674af3a366289ada64c63082cd6b402711b48b25a6392e4b0f
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'trafficel.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text fragments that may be related to the lure. No scripts were extracted, but the presence of external URLs suggests an attempt to redirect the user to a malicious site.

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://trafficel.ru/strik?utm_term=catch+and+kill+farrow+pdf
    • https://vafubetuxako.weebly.com/uploads/1/3/4/5/134503762/supozo_fifuda.pdf
    • https://febixitojujemo.weebly.com/uploads/1/3/4/4/134402622/tejiwijutuletisuwipu.pdf
    • https://zonilalafujagep.weebly.com/uploads/1/3/4/7/134731182/zuxaxupot_manoxit_nowevexafu.pdf
    • https://cdn-cms.f-static.net/uploads/4484107/normal_5fae72901b500.pdf
    • https://cdn-cms.f-static.net/uploads/4421939/normal_5f993e106f295.pdf
    • https://cdn-cms.f-static.net/uploads/4463034/normal_5fb03334ea28c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e82d5bd2-feb8-416f-8802-ea3d53fd95f0/kobutufexez.pdf
    • https://uploads.strikinglycdn.com/files/6195b541-4f8a-4d92-bcbd-39ecc30015fc/38305731072.pdf
    • https://uploads.strikinglycdn.com/files/50a2c326-4257-4a15-bfbe-2eb611101781/noragagagorad.pdf
    • https://uploads.strikinglycdn.com/files/357280d1-167d-4100-bddd-017636575e19/tudusanakijiwunagilituf.pdf
    • https://uploads.strikinglycdn.com/files/46f1b0dc-944a-40a5-b89a-eca8c9204d02/jesus_calling_for_kids.pdf
    • https://uploads.strikinglycdn.com/files/51b22ad0-ccd0-4527-ad3b-37dfa19a5580/fegoreketafaguwesag.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_off0000d199.bin
feeb6487e626b3b707bf76bdd919b8450bc57e19ab7821bd112004f0060d4be7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD199 5124 bytes
font_01_sfnt_off0000e317.bin
f69cb3d88a4e467f036ed12d16cd8a74648390a9635749618256db14781c699c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 10472 bytes

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