Malicious PDF — malware analysis report

Static analysis result for SHA-256 938c9dccd52541e0…

MALICIOUS

PDF

74.3 KB Created: 2021-06-13 07:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22ad850c7f132b2b573430d17b32c659 SHA-1: da2adf2c3ea538ffc810f1acc8346bb2906642b4 SHA-256: 938c9dccd52541e0ac156dc15bd821087f5b530992228bf3557e092abfa4edfd
104 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. The embedded URL and the document body suggest a lure for downloading content, likely a malicious payload. The presence of a download button heuristic further supports this attack pattern.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://krisoc.ru/pbw?utm_term=passion+of+the+christ+full+movie+telugu+download
    • https://cdn-cms.f-static.net/uploads/4401697/normal_6028ec3781a9f.pdf
    • https://cdn-cms.f-static.net/uploads/4489839/normal_606d8c0c542f7.pdf
    • https://cdn-cms.f-static.net/uploads/4501356/normal_602420abf34e0.pdf
    • https://cdn-cms.f-static.net/uploads/4446399/normal_6025ced06e3d1.pdf
    • https://cdn-cms.f-static.net/uploads/4454665/normal_6032fd8136c77.pdf
    • https://cdn-cms.f-static.net/uploads/4486368/normal_60c575ee7015c.pdf
    • https://static.s123-cdn-static.com/uploads/4367294/normal_600753bcd3df6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5802d7aa-d457-456f-8e45-5c69484c18ec/duraxe.pdf
    • https://uploads.strikinglycdn.com/files/ec45bf5f-e498-486b-90a7-2b9ef6a80a7d/fogokovabamadogexujix.pdf
    • https://uploads.strikinglycdn.com/files/f23790f2-b522-495f-8c55-319a54794131/after_we_collided_2_release_date_usa.pdf
    • http://xifilipisi.pbworks.com/f/free_printable_lesson_plan_template.pdf
    • https://uploads.strikinglycdn.com/files/99f1e9da-2e09-4590-a8da-3e6b5953ee40/wogewaresijed.pdf
    • http://zupelapowi.pbworks.com/w/file/fetch/144940746/fasowag.pdf
    • https://uploads.strikinglycdn.com/files/efc4b96b-c9f8-4297-a6c7-ae97cf54c852/mivewerujavud.pdf
    • http://gijorugisaw.pbworks.com/f/35596871502.pdf
    • https://uploads.strikinglycdn.com/files/3652aed0-9b1a-4607-99b8-50a955161115/masterbuilt_butterball_20_lb_xl_electric_turkey_fryer.pdf
    • http://moxulolo.pbworks.com/f/hindi_english_translation_ebook_free_download.pdf
    • https://uploads.strikinglycdn.com/files/b590dfed-7b70-4026-a544-955797dd0aeb/what_does_the_woodcock_johnson_test_measure.pdf
    • http://zixememot.pbworks.com/f/dr_najeeb_lecture_notes.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_off0000e514.bin
d45fecefba622100f34a69241de87ca856f959d2cb00a3e8b36a99c58113bf60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 5588 bytes
font_01_sfnt_off0000f7fe.bin
594b5943039fb1a05f41b6d57a9092a44e6f0f45e9ff2f0bb1d89cec37757e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FE 10528 bytes

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