Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2525532a62f7aba…

MALICIOUS

PDF

83.4 KB Created: 2021-07-18 04:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0621cd500cb72f47d0d42c6f57ee2c04 SHA-1: 936943c4cf232d0462727af8ef27fa7d78c5e219 SHA-256: a2525532a62f7aba8d8acae6bbed730fa327bbc80452f8e3444fd92d466096c7
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 specific ClamAV detection name indicating it's a phishing trojan. The PDF contains an embedded URI that points to a URL, which is a common tactic for phishing or malware delivery. Although the document body is heavily obfuscated and unreadable, the presence of the URI and the heuristic firings strongly suggest a malicious intent to redirect the user to a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8516

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/eaN1Eb74jJI/square?utm_term=watch+90+day+fiance+happily+ever+after+online+free+123movies
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2aa75ac7784023563cc34/1626516085533/93376889146.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f37c2d1434f63547264fe4/1626569773699/kajavuwoxubaxivasuf.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f3012a0b1749089209acbb/1626538282855/tonevevifameverunib.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee8e6027fa864c7d15ecaf/1626246752792/how_often_should_you_acid_wash_your_pool.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f234980a88cb63e5be3aca/1626485912762/intermittent_fasting_water.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f14f5ada20a917db5149aa/1626427226941/judalurazaripedefanu.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f33d2c2e59700d3e5d3233/1626553645013/biduzid.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_off0000de13.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE13 16792 bytes
font_01_sfnt_off0000f625.bin
a5b84bf83ef1660b0fa75a925764f34a20503544a82ad357e7f4d911bf18e0d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF625 17220 bytes
font_02_sfnt_off00012338.bin
75b3ea76fc057ffcb1a48494513f6e8d3e722ccad3cd248acf54566945c10529		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12338 11692 bytes

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