Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d32a0e000187f7…

MALICIOUS

PDF

76.0 KB Created: 2021-07-21 00:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6586ceb1b829fca55517dc7c5afc78b8 SHA-1: d6e93bf94596c22e0c905e02b3416795cfee49ec SHA-256: b7d32a0e000187f7fd9e14e780ad4c02d2699e0063d21cd4d81340188d9610d6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'wastran.ru' was extracted, suggesting a potential phishing or malware distribution attempt. Although no document body text was readable, the presence of an external URL and the overall malicious verdict strongly indicate an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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://wastran.ru/square?utm_term=4000+rmb+to+sgd
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec85e68300fd66e1968c1b/1626113510795/vonevukotux.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed6fa63489b768f170c85c/1626173350114/fire_mage_talents_pve.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92158085b1c120f980098/1625891160342/6922214812.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_off0000cc97.bin
af3e27fb617a176a8be06dad819f426f38186319e46c22e293accbadb8078ef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC97 10300 bytes
font_01_sfnt_off0000e394.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE394 16792 bytes
font_02_sfnt_off0000fba6.bin
99aeb7cc19284204f8e1c15a77afa292f76ce0d254f403f9da1750f8383f7481		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA6 15964 bytes

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