Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf57a8dfea9c12f…

MALICIOUS

PDF

75.6 KB Created: 2021-07-13 06:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1712eace258dee2acf6dacd8b1f60c9a SHA-1: 34c46e9a4bc142230786f590abc7745ce8a15321 SHA-256: dcf57a8dfea9c12fa122c6fc04325e6dd34e84683a11b7c9c3894e525be609e6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected this file as a phishing trojan. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8028

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://garglob.ru/square?utm_term=force+between+two+parallel+current+carrying+wire+is+independent+of
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7ffc37d3b385c94b6f843/1625817027794/13264724333.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e79a314aaab0286a871d91/1625791025390/what_is_the_collective_noun_for_robbers.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d680c6497b0f478ed5a8/1625872000579/when_do_i_conceive.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_off0000c6d4.bin
1b24f1365fa0f0ee850bec7734830a741b4532dd6f6f4bd7953fe51c15f91741		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D4 15956 bytes
font_01_sfnt_off0000eff0.bin
479003c63b642b456c3ef83501b9c9b7109fb3b0ba93312244587a0a4b94b41c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 11212 bytes
font_02_sfnt_off000109ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109EE 16792 bytes

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