Malicious PDF — malware analysis report

Static analysis result for SHA-256 890e4e2929268a2e…

MALICIOUS

PDF

79.7 KB Created: 2021-07-13 22:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a534c48af3591ce6f75ff44914328828 SHA-1: 192707bc4247e5bc5a515ebae0f7c4ed1ccadcb4 SHA-256: 890e4e2929268a2ee0da8a2ade4d86acb2e70e2ded61f033e4ea067e3aa958db
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a PDF phishing trojan. An embedded URI points to a URL that appears to be part of a phishing lure, likely attempting to trick users into visiting a malicious site. No scripts were extracted, but the presence of the embedded URI and the ClamAV detection strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.1467

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/cEZ-xJcQpFE/square?utm_term=how+do+i+take+the+passcode+off+my+iphone
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eda5173d37cd087e6d43e0/1626187031616/suwiw.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eca241e7718717d764d26f/1626120769420/projection_of_points.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_off0000d721.bin
b4fc8180b2bf1c176e52b74da2150854d3f877ea0053a7d02b0ebc086987f329		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD721 11020 bytes
font_01_sfnt_off0000f0a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A3 16792 bytes
font_02_sfnt_off000108b5.bin
07f8f243f200b66a44d9c304f1f66849c1ca257532fb4b0f84fc1e98bc142d64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108B5 16380 bytes

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