Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2682bb377fcdf58…

MALICIOUS

PDF

66.5 KB Created: 2020-11-14 09:57:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8b238828f2e8713482d3977c6cdb60d SHA-1: 195e49a58caa84ef9685577d2dc522e30af9a1dd SHA-256: c2682bb377fcdf5840714d897522f30014a5f906e73c9e6bae4456a3bbf2cfea
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'trafficel.ru', which is suspicious. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, appears to be a lure related to weather information, likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=glacier+bay+weather+in+july
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f9a7a8972c6f.pdf
    • https://cdn-cms.f-static.net/uploads/4425910/normal_5fa4d38245ba8.pdf
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f8c86fb85f9e.pdf
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/9232432.pdf
    • https://cdn-cms.f-static.net/uploads/4417423/normal_5fac390b95cfa.pdf
    • https://cdn-cms.f-static.net/uploads/4405459/normal_5f955c18706b1.pdf
    • https://cdn-cms.f-static.net/uploads/4385228/normal_5faba5ed2907b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wukara/greek_alphabet_worksheet_free_printable.pdf
    • https://s3.amazonaws.com/pewebopufupe/lds_conference_october_2019_changes.pdf
    • https://s3.amazonaws.com/sesafefanulokam/saint_laurent_bertrand_bonello.pdf
    • https://s3.amazonaws.com/xanebavifamopez/55635036625.pdf
    • https://s3.amazonaws.com/zirojopemup/3013052488.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_off0000bf5d.bin
f597ea8e62fd0fe7e396a290f9e8f0759c3c7a5825a542d14db72b1b2d091f50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5D 5148 bytes
font_01_sfnt_off0000d0f7.bin
27731cbcbcd41e5f25f45ee2ee4fb042c820afa7a02cc955445388792b272e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F7 14112 bytes

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