Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bcadf617a8a319…

MALICIOUS

PDF

74.5 KB Created: 2021-07-12 22:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 884588429c7338dee97dde09389177b7 SHA-1: 0058a52c467c4f245c0641d6476a68e2c0fe020a SHA-256: 02bcadf617a8a31984e36a5eb60e1a5d599a360b439cd2ae0f3e79304fed2132
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains embedded URLs, one of which is flagged as external. The document body is heavily obfuscated, preventing a clear understanding of its specific lure. However, the presence of embedded URLs and the malicious verdict suggest it is likely used for phishing or to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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/sq/ugae/~3/5VO7y1TeAqQ/square?utm_term=hand+signals+of+the+referee+in+volleyball
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92a802f3c4128e18aa3de/1625893504487/86244698222.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8e331f492d21a0f67ba22/1625875249736/88912684653.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e952c819a9f87deb746668/1625903816620/pulp_and_paper_chemistry.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_off0000c492.bin
2a328b34b2b97781e2be289798672c87d617c0ed3c7c224d33690e3fdb92daa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC492 10944 bytes
font_01_sfnt_off0000dd99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 16792 bytes
font_02_sfnt_off0000f5ab.bin
46d65fdbd777f8efce587875f3a2b06134afee60dc10d1b33b55765fc45d8ecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AB 15788 bytes

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