Malicious PDF — malware analysis report

Static analysis result for SHA-256 39abd80ac3cd5b5b…

MALICIOUS

PDF

98.8 KB Created: 2021-07-13 04:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5528a3f3565df08e29da589e9eb32a60 SHA-1: 2238ed35e9b08edf5c45d88ab08642cff0890a07 SHA-256: 39abd80ac3cd5b5b4a61fcd61e18ef6b0a8a5f54fdfdaf1e6ade694df7f25ccd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains embedded URLs, suggesting it may attempt to redirect the user to a malicious site or download a secondary payload. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8078

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://feedproxy.google.com/~r/sq/ugae/~3/J-SxIuB37Ms/square?utm_term=kirby+right+back+at+ya+episode+23
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e818845eabb22f35dd0b4e/1625823364518/21460586826.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e809a146a8e17713e690a0/1625819553825/82712433244.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7baf09ebc0053f314e04c/1625799408827/55984632117.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e931f8b68d8f0f4bf8d155/1625895416567/ranusakinaririlogemojup.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7c6b3a853d606aebb7c4/1626111083750/vuxogi.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ecce47caf21f280d7df813/1626132039353/my_car_was_towed_by_police.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_off00011b79.bin
b98f3da350f3c46d70900000d392f86ba830ba2c2430244e0abb165d88be712d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B79 11272 bytes
font_01_sfnt_off000135ca.bin
497864545a5af4a93bc2ce8f6d0da9ac17e846e11d7f9cbe9268419d1c008976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135CA 18536 bytes
font_02_sfnt_off00016746.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16746 16792 bytes

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