Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbcbfca2f5a3fed…

MALICIOUS

PDF

82.1 KB Created: 2021-03-03 01:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 650b8b2667f64538e82e7c84b2792da2 SHA-1: 12ca35594c7f4fa1df6155dbf995691b3ee85b7b SHA-256: bcbcbfca2f5a3fed36b3ab5ec1a1db641a21d8fcb9dc8e1da8433354b2469343
104 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'resalured.ru' suggests the document is designed to redirect users to a potentially harmful website. The heuristic 'SE_URGENCY_LURE' further supports the phishing pretext, implying the document uses time-sensitive language to prompt user action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://resalured.ru/123?utm_term=12step.org+step+2+worksheet
    • https://static.s123-cdn-static.com/uploads/4481663/normal_60011aed7bd59.pdf
    • https://ginamepi.weebly.com/uploads/1/3/6/0/136024017/86bc378f1d7.pdf
    • https://static.s123-cdn-static.com/uploads/4448339/normal_5fc5e5e4711f1.pdf
    • https://static.s123-cdn-static.com/uploads/4449009/normal_5ff0b2a1b5bbe.pdf
    • https://cdn-cms.f-static.net/uploads/4495400/normal_6038bb5f3bb3a.pdf
    • https://static.s123-cdn-static.com/uploads/4376126/normal_5fe4c42ce0278.pdf
    • https://pezawixutumef.weebly.com/uploads/1/3/1/1/131164564/1042381.pdf
    • https://cdn-cms.f-static.net/uploads/4424662/normal_6026149b04242.pdf
    • http://wiwuwanulujero.iblogger.org/get_your_guide_discount_code_amsterdam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zovuzizosagedip.epizy.com/62261107657.pdf
    • https://s3.amazonaws.com/pegek/vuzemexedubirezatev.pdf
    • https://s3.amazonaws.com/metubevozisul/15927794498.pdf
    • https://s3.amazonaws.com/fowikorejodi/47754794714.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_off0001051d.bin
e54b756e27b2436a52aadb9da473dccc2d6e7cf042c811b2e21cf774b59f75e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1051D 5116 bytes
font_01_sfnt_off000116a3.bin
5df96847e254a3edca7657dffcc519c02771f3a95e287eed5c9d2cc21fa12d30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116A3 11016 bytes

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