Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7a2296eb196ec2…

MALICIOUS

PDF

76.5 KB Created: 2020-12-26 23:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea2487afb1056fba83cedc5c559a63c4 SHA-1: 78e06a9edca66fa07ba287d63b0a58c52ecd26f1 SHA-256: 0a7a2296eb196ec211993616becb2bac54549ed8be69814686845bb1a9ec9f52
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://trafffe.ru/aws?utm_term=bbm+full+form', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'Bbm full form', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=bbm+full+form
    • https://cdn-cms.f-static.net/uploads/4372382/normal_5fdb5c96b13c3.pdf
    • https://cdn.sqhk.co/wemofisejaf/OWFL4hd/83160222071.pdf
    • https://cdn.sqhk.co/fabupiguboxa/R7RQibq/photo_effects_software_free_download_for_windows_7.pdf
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5f9a5b5ced0a6.pdf
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f99b54278497.pdf
    • https://cdn-cms.f-static.net/uploads/4480590/normal_5fdb0b3775507.pdf
    • https://static.s123-cdn-static.com/uploads/4388432/normal_5fc85ffceeec6.pdf
    • https://cdn-cms.f-static.net/uploads/4402297/normal_5f97ec38b8e91.pdf
    • https://cdn.sqhk.co/wuseguwe/qiGgfgi/epson_iprint_iphone.pdf
    • https://static.s123-cdn-static.com/uploads/4483604/normal_5fe45d63e9831.pdf
    • https://static.s123-cdn-static.com/uploads/4403688/normal_5fc713b610530.pdf
    • https://cdn-cms.f-static.net/uploads/4502336/normal_5fb705e172558.pdf
    • https://static.s123-cdn-static.com/uploads/4445888/normal_5fe00c5ccad58.pdf
    • https://cdn-cms.f-static.net/uploads/4375353/normal_5f936dfb536a8.pdf
    • https://cdn.sqhk.co/kezixowog/8ib1hgy/85821813978.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f0ce.bin
73ae1c7e971ae624cc7bd75f3c44d52ed95357704d5a4a8f1db501f0ce05627b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CE 4712 bytes
font_01_sfnt_off000100c6.bin
c36c57cba3c12a5651d5b68e4ef20e626f0c0de5f491460f126303f7e35a837b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 10728 bytes

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