Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5a373ca30567dd…

MALICIOUS

PDF

160.5 KB Created: 2021-07-19 18:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62e08c37c72d6e74d795eef33e134f4f SHA-1: a3bd850400be6299b25306bdaa915e7b623c8503 SHA-256: 1e5a373ca30567dd62232b537e715816b9af57054429bcd6c4407293a7a4fc14
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The presence of embedded URLs, though many are confirmed benign, suggests an attempt to redirect the user to a malicious site. No scripts were extracted, but the PDF structure and heuristic firings strongly suggest malicious intent, likely to deliver a secondary payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5498

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://feedproxy.google.com/~r/razvivatel/yapz/~3/7R6buoffwiA/square?utm_term=total+surface+area+of+tetrahedron
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eda9208b6fd7287616544c/1626188064801/37782871226.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee27b3462f394a1e408bfe/1626220467564/the_old_station_guest_house.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f3ecc280d83038fa883463/1626598594938/ken_wilber_theory_of_everything.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8ee7af4fe78435a38285b/1625878138353/two_stage_gearbox_design.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8668c42a7165951d9c687/1625843340793/raid_shadow_legends_best_rares_for_fire_knight.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://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_off000205ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x205CE 16792 bytes
font_01_sfnt_off00021de5.bin
1cdd76c9c44d1ea5e848e9b4c03a75cacb2eb0cc0cb03478a3e6a8c7cbe346db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21DE5 10544 bytes
font_02_sfnt_off000235ef.bin
17e9c63c2ed9222c059046eea48d86404caaa51a35289fc54186247c7fe61d79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x235EF 23220 bytes

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