Malicious PDF — malware analysis report

Static analysis result for SHA-256 e091b2b8465ebef3…

MALICIOUS

PDF

85.3 KB Created: 2021-05-20 15:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36e7deaae35c89dad57f263e19270e83 SHA-1: d44aa6e38984540322f373da18d727838f18320c SHA-256: e091b2b8465ebef3e23f3be3a9ca9c188ee34cae166d0e37e023d3f6b66ac612
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests an attempt to disguise the malicious content as educational material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=controle+maths+5eme+proportionnalit%25C3%25A9
    • https://cdn-cms.f-static.net/uploads/4409806/normal_605b0c293460b.pdf
    • https://cdn-cms.f-static.net/uploads/4495262/normal_60186257158cc.pdf
    • https://static.s123-cdn-static.com/uploads/4366319/normal_5fefb7c7c9fc6.pdf
    • https://cdn-cms.f-static.net/uploads/4414495/normal_600f5957b94fb.pdf
    • https://cdn-cms.f-static.net/uploads/4382189/normal_600d252535dc6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mixanaz/pibezozanojipumiv.pdf
    • https://uploads.strikinglycdn.com/files/cb0beeef-5e32-4081-9e79-ee1be959948b/69583711675.pdf
    • https://s3.amazonaws.com/dapekufoxiraku/80449588391.pdf
    • https://uploads.strikinglycdn.com/files/86b8ede1-8af8-4f5d-890b-9a52f0302c26/boxelovexenubewewiboka.pdf
    • https://uploads.strikinglycdn.com/files/050d19c7-5b77-4693-8d61-cf5e9dc27564/kindle_fire_hd_7_case.pdf
    • https://uploads.strikinglycdn.com/files/810629ee-9120-4ff4-aa77-4ba80302cac8/46641640091.pdf
    • https://uploads.strikinglycdn.com/files/05d60a92-eed4-4f08-bc7c-06b6fbf99ab3/best_target_rifle_for_200_yards.pdf
    • https://s3.amazonaws.com/genukopapovixo/why_does_my_logitech_headset_not_work.pdf
    • https://uploads.strikinglycdn.com/files/aa9c0742-91ed-415a-9a10-09309c4aac40/chamberlain_error_code_4-6.pdf
    • https://uploads.strikinglycdn.com/files/3010ba93-2bbc-4958-9a81-bcc0785323a9/jajaratarogobumanefala.pdf
    • https://uploads.strikinglycdn.com/files/074d55f0-e078-4649-aefc-cf8994a89df5/ge_profile_stainless_steel_over-the-range_microwave_oven_-_pvm9215skss.pdf
    • https://uploads.strikinglycdn.com/files/9a3d3d19-13f6-4756-b71d-132d209c1bc1/juranofovumi.pdf
    • https://uploads.strikinglycdn.com/files/6ee43a45-e4b6-4eda-847c-c0c1c4b07011/ragefuwudoturajik.pdf
    • https://uploads.strikinglycdn.com/files/9d402a54-bd47-4a9c-8dac-0c999b7c38a9/kigusulelonit.pdf
    • https://s3.amazonaws.com/gurafoga/paxukinadamokaxe.pdf
    • https://uploads.strikinglycdn.com/files/08a36152-1c16-492c-b250-9f28a6b5d90d/70787830294.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3fd.bin
7f5eb905429d21f7dc027a8e19fffa9a7269413753d93ba3df110d85a452f41a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FD 5232 bytes
font_01_sfnt_off0001054d.bin
4c73e7d82a90ee1368f5d0632414da3fa619f95e67ecabccaaf1fd4567eef6be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1054D 13584 bytes
font_02_sfnt_off00013060.bin
91cb1c6411aaf4c66a9213ef80c8704d00df78b4e19fade3e3c2b1e7d455e2c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13060 16152 bytes

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