Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bae5dafbc3aacc…

MALICIOUS

PDF

75.7 KB Created: 2021-07-14 06:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e527146449195c812fed83f6cdeb9d27 SHA-1: 373f3d1a90843c30b9e37481a7cd59ae207c6c6c SHA-256: 97bae5dafbc3aacc98eb64e5dd0aee2066237db1eefbffdd67da23d0baccfa4f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to lure the user to malicious content or download further stages. The PDF structure itself contains unusual elements, including duplicate object bodies, which can be indicative of obfuscation techniques used by malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/pL_UGxDroB4/square?utm_term=hollywood+the+dream+factory+1972
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e0b78915684aa539907b/1625874615180/do_possums_carry_their_babies_on_their_back.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed5d8a7ab2906137d54e46/1626168714290/lipomexelibubomaw.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_off0000c62f.bin
761fe9b56ffcbd52e2f71027bc11b220e1918ae04d7e884366f07d0a40d43253		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC62F 16676 bytes
font_01_sfnt_off0000f182.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 16792 bytes
font_02_sfnt_off00010999.bin
c623e8a60cca8d67882963c708f3dd6feed87f64e11b918b94817cc1dbe6a235		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10999 10960 bytes

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