Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e3d935a4f89aa9…

MALICIOUS

PDF

73.9 KB Created: 2021-07-13 16:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ecee32ebcf4817f1f6e406b64541af21 SHA-1: 96a3275b9c838b31446cbfdabad2ddb0b3999a4f SHA-256: d6e3d935a4f89aa917148232aaf52a61e3a7534061a3df1e622598580c4675b9
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 critical heuristic flagging it as Pdf.Phishing.Trojan. An external URI pointing to 'archism.ru' was extracted, suggesting a potential phishing or malware distribution vector. No scripts were extracted, but the PDF structure and heuristics indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8802

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://archism.ru/square?utm_term=working+of+half+wave+rectifier+and+full+wave+rectifier
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e961b7fc46b1505829d901/1625907639130/if_i_liked_little_fires_everywhere.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8983c7ad560129958e30e/1625856060534/warning_signs_of_a_seizure_in_a_child.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed6064c439f82871643ca1/1626169444556/living_together_after_marriage.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8194d4261ba7980638313/1625823565777/xalotewizapivejesofum.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec81338300fd66e1960608/1626112307902/navadudeluwukazijeg.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_off0000c05b.bin
30ab14dcf7e6e69cd9bdbd85f4b5382c9d008f5c2d54bce690dd858f5bf5d2fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC05B 16164 bytes
font_01_sfnt_off0000ea40.bin
3317761c2d9202b64277c1292b631c417b812c16dd7c92d0cd45aa61066c1372		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 10924 bytes
font_02_sfnt_off0001035b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 16792 bytes

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