Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c613edf63f6608b…

MALICIOUS

PDF

89.3 KB Created: 2021-07-14 04:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c19db1bb481d169d1f7cf8c4673c9be7 SHA-1: f98bd0869f7b609bfd88cee47bbe9a5fbca869dc SHA-256: 0c613edf63f6608b25911e0058aae6b6fd211b46fad9853ce6101a9306c733c4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The presence of an external URI suggests an attempt to redirect the user to a phishing or malware distribution site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

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://inwebjor.ru/square?utm_term=intention+to+create+legal+relations+pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec848adbb514329faf41c3/1626113162286/22_60_house_plan_west_facing.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eca17d0e7a3c5fba405b2f/1626120573967/lajiwezegidujazafed.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e965d112fb7d0b279560dd/1625908690176/into_the_wasteland.pdf
    • https://rb.gy/nmq3cg
    • 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_off0000fd12.bin
78991c27b638c07c0311c3703ed1f7b54bfe3ad4357934700ff701111997a804		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD12 16680 bytes
font_01_sfnt_off0001289f.bin
2db9a74ee455d3a43e4a7d56ee692bd6717efab3bf0d27b6d2b75b729a7e0150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1289F 10744 bytes
font_02_sfnt_off0001413a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1413A 16792 bytes

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