Malicious PDF — malware analysis report

Static analysis result for SHA-256 46352398f8dd3885…

MALICIOUS

PDF

70.5 KB Created: 2021-01-06 03:34:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 77e5ba170a6f9a8fac9594b4dbea5aeb SHA-1: 96a85a60fad9826124a855c5bbd0d34e0f30b738 SHA-256: 46352398f8dd388592e3dc7b471a0a97d5e6edf003272d2eaceed4cf8950c24b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ClamAV detection and an ML classifier. It contains an embedded URL that leads to a suspicious domain, likely intended to trick the user into downloading malware or visiting a phishing site. The document body, though heavily obfuscated, contains keywords related to 'firewall' and 'apk', suggesting a lure for a malicious application.

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://trafftec.ru/aws?utm_term=firewall+sans+root+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450415/normal_5fe0bf4ea1d39.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/lebutip.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/G0gihbQ/ok_stickers_for_whatsapp.pdfIn PDF document text
    • https://cdn.sqhk.co/padirazemi/dhfhfib/kujida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f9265702e80c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f8b060ce8154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448735/normal_5fbf17f557b4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_5f93e94e80ed1.pdfIn PDF document text
    • https://zitejapaj.weebly.com/uploads/1/3/1/8/131872087/momamuvur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_5f944264da8ca.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/zgjhgpb/too_many_birds_in_one_tree_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401711/normal_5ff4b5412cbb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52E 4924 bytes
SHA-256: b9df715c74fa035db050ae04c93e81b8947838180e61f26b24cb6d5cada9f2b8
font_01_sfnt_off0000d612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD612 10084 bytes
SHA-256: 3a2f9bb6130d35096910eb68bea0c8a32164c8d3fef42fc9614b28479f4e0a2b
font_02_sfnt_off0000f8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B2 16068 bytes
SHA-256: 5d72d630640305d452d914085fd6c65e0d8125198bed8028c282d44fd0327be8