Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2f80157d51d1dd…

MALICIOUS

PDF

80.6 KB Created: 2020-11-22 15:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97a8d41dbec6f923e7dbf290e1422b07 SHA-1: d14539cba648bd9708d1f14f669dff0d9ba8f625 SHA-256: 5d2f80157d51d1dd26ce590f5a2f9e4d6b7e6ee8fe6c783805c4681d5b27ee10
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'spelling test form'.

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://trafffi.ru/aws?utm_term=spelling+test+form+first+grade
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5f8f672a2691a.pdf
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f995c18991bf.pdf
    • https://cdn-cms.f-static.net/uploads/4425926/normal_5f98e8dd6b006.pdf
    • https://cdn-cms.f-static.net/uploads/4479435/normal_5fb42e93f0fdd.pdf
    • https://cdn-cms.f-static.net/uploads/4409630/normal_5f96c3dfa8039.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6848c5e5-7c71-4719-944c-19f5e68b80f3/4046333248.pdf
    • https://uploads.strikinglycdn.com/files/59548e9b-ea68-4b4c-8098-36d72d37ea66/xatipenuwilusoraladame.pdf
    • https://uploads.strikinglycdn.com/files/b72bb2a3-bd14-4b46-9e1d-3899263c1edc/fomopuwolib.pdf
    • https://uploads.strikinglycdn.com/files/63ddce3e-ede0-41d8-a0a2-950a4218c44e/nias_follando_travesti.pdf
    • https://uploads.strikinglycdn.com/files/046ccbc8-494a-4412-80f1-f9ebd8925db5/gopro_hero_3_black_edition_camera.pdf
    • https://uploads.strikinglycdn.com/files/ef972899-a2de-4910-9e84-6f33c53ead58/23154947407.pdf
    • https://uploads.strikinglycdn.com/files/f00bf30c-973e-4281-8733-36ce4c2edf47/chapter_review_chemical_reactions_answer_key.pdf
    • https://s3.amazonaws.com/gisujubolidine/psychic_predictions_on_november_election_2020.pdf
    • https://uploads.strikinglycdn.com/files/fc36d7a0-4af0-4725-aa54-cdf22b4bde82/vareve.pdf
    • https://uploads.strikinglycdn.com/files/4f71e497-413c-42d2-b058-620cb592cdcc/57968291661.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e007.bin
08a27f4d274ac12a0f056cfbd600b90d4ad3550d3789c50c8a0897126f9364a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE007 5464 bytes
font_01_sfnt_off0000f27d.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF27D 1800 bytes
font_02_sfnt_off0000fb0a.bin
f96d5e59aab38393a25757cb4e8e79fea3e5d17353515f6e2a74abde82d7f94a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 10840 bytes
font_03_sfnt_off00012017.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12017 16092 bytes

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