Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff774076b29ff9a7…

MALICIOUS

PDF

85.1 KB Created: 2021-07-15 16:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ca9486db87bc368b726b6a33d08095b SHA-1: 4606e5be020aa317f01c94490a2b0954faca4ef1 SHA-256: ff774076b29ff9a75983facf5636b8e41ddcd430caa4cb0b0c87a7d0d269fc70
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing trojan. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5817

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/iXsW93xxTQA/square?utm_term=borr+drilling+limited
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8eeb1cff58014d549aaa/1626115819648/combs_ditch_racehorse.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edd3809779423221dea300/1626198912867/iud_and_pcos.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f02d691a40e7189054303e/1626353001563/67827737963.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eca99a45711547b6aa008a/1626122650489/reflux_and_sore_throat.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_off0000e904.bin
70f3f61bc485cbed61e1167abbcd04b7c1dff2cae1e9338e8bb36720cc1cede9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE904 10312 bytes
font_01_sfnt_off0000fff6.bin
40e0a7923a07041ab11d4a421cc63a2557bf30c74f44a34205f22627f1026811		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF6 18336 bytes
font_02_sfnt_off0001308c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1308C 16792 bytes

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