Malicious PDF — malware analysis report

Static analysis result for SHA-256 df225550656032ea…

MALICIOUS

PDF

77.1 KB Created: 2021-07-18 09:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b6b2524e4af70743f953da404327136 SHA-1: 6c8db98ba4601c7e237fca4aece0ab8335f70f56 SHA-256: df225550656032ea76579218804453251096191acb18b85f9e5cf228a3abea87
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs suggests a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to initiate malicious actions like downloading further payloads or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9214

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/razvivatel/yapz/~3/iXsW93xxTQA/square?utm_term=find+used+ports
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8051848fdc259404289cc/1625818392523/rooftop_canary_wharf.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f3a6bda047b6361228b428/1626580669926/bozazesedefesexu.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7e1fc4d2175279d13be40/1625809404925/johns_1994_model_of_reflection.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee92e4fc191471fc70f5cb/1626247908911/24580378756.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f36101fb6d8f5e805963f0/1626562817364/meforuxomijunamep.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0ba254bb49071de131cf9/1626389029515/61843189574.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e798fb97884458c99dc0fe/1625790715749/4017318868.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_off0000cbbe.bin
42f2304829bb578fd9c0145e96a10c823fc396505c2771f0cb617d6f4a5e4580		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBE 17340 bytes
font_01_sfnt_off0000f99a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF99A 16792 bytes
font_02_sfnt_off000111b1.bin
64484d616b51db1932ac1a0c79ee9f53c7846f0f4d5e7fd3b52537306a4d2ea0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111B1 10252 bytes

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