Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41747edb5ef3948…

MALICIOUS

PDF

77.2 KB Created: 2021-07-17 10:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 642b7cfeb8757ef163305fc4b19d81b6 SHA-1: aebd834108981448daa9611692c500075c8aef6d SHA-256: b41747edb5ef394814ef87d6bf808313ad7591bb688ebd112bf3a3b0ed00ef16
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of embedded URLs, despite some being marked as benign, suggests a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the overall indicators point to a malicious document likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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://feedproxy.google.com/~r/sq/ugae/~3/UZrB20b2Dcg/square?utm_term=state+any+two+properties+of+acids+and+bases
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f285b4ac7784023562b9d0/1626506677034/zawulalozu.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8f2722dabf272355220fa/1625879155043/43369857452.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9171c8ce0e10532d26afb/1625888540478/free_after_effect_plugins.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed5d963b21860fe6706077/1626168726278/99642170888.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e90ff63ba7d954d5456b50/1625886710834/tenemamino.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec72f554a52c186ce3479f/1626108661134/moporuxopolekedejuz.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_off0000cbab.bin
c02f0461590641b2f9c10f045e7cd5e987f6f2e01c554789918ae749989186b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAB 16596 bytes
font_01_sfnt_off0000f73b.bin
ed162ed4fcb540f93402f67ef1013dda9192ea5326bdf2c3384d7280e7f6c967		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF73B 10984 bytes
font_02_sfnt_off000110b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110B6 16792 bytes

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