Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70f002180a14c0d…

MALICIOUS

PDF

79.9 KB Created: 2021-07-13 19:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 851e2f5bc2672f70fb5be403972d8f30 SHA-1: c21cc57797f1e50b501b8d2d2619792ce6f1f7f1 SHA-256: a70f002180a14c0db90a5868ec812e9ee715dd2c8734964faeef1d4079e8b1ff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, though marked as benign, suggests an attempt to redirect the user. The PDF_URI heuristic firing also points to the use of external URIs within the document. While no scripts were explicitly extracted, the nature of the detection and the embedded URLs suggest a phishing or payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6980

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/razvivatel/yapz/~3/0YvHz_IItD0/square?utm_term=1984+big+brother+quotes+with+page+numbers
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed9ef48525735ba0d1ae11/1626185460552/bibubivakejisoxotul.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7a57557d2352c927955d0/1625793910140/rofusabiramuve.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec9444a1b53f2c225f2bc4/1626117188562/fast_furious_shaw_and_hobbs.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_off0000d0bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BF 16792 bytes
font_01_sfnt_off0000e8d6.bin
67ef688c61d442064d577f46b96ae2cfcf00a0f6ab03d48c7eb0e04c09f43235		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D6 11536 bytes
font_02_sfnt_off0001039c.bin
2cfd4bb695eb710be408a03f6605e817b425a56d33db5b230d005751f300573c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1039C 17716 bytes

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