Malicious PDF — malware analysis report

Static analysis result for SHA-256 d174cf959e2a8c42…

MALICIOUS

PDF

142.5 KB Created: 2021-07-13 20:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc35a3eba913b3d753b9334cceb83a8f SHA-1: 66f34654ec8841873b6c9ce5fd4cf1f03e806eb0 SHA-256: d174cf959e2a8c428280c3fc4678ba40499d69caa470df1e9072ecda95c9f733
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojanized PDF. The presence of embedded URLs, though currently flagged as benign, suggests an attempt to redirect the user to malicious content. The PDF structure also shows signs of manipulation with duplicate object bodies, which can be used to hide malicious code.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3803

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/CHqDoFjlE84/square?utm_term=the+collected+short+stories+of+roald+dahl+read+online
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e95bd1025aa46e30d4929b/1625906129867/52046258963.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9217aaa30721e65ef2920/1625891194541/dosuzugidasodalekadex.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7908dce8457037ede6bb7/1625788557874/8190004497.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_off0001c907.bin
d020502c8557c8eb86fa7d8d00c813555a35bb2a5034ad0190a60cffb044f272		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C907 10536 bytes
font_01_sfnt_off0001e0fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0FB 16792 bytes
font_02_sfnt_off0001f90d.bin
e03bc8c5bb854134a86c9101e9acb2a47ae039e74cb75508338463bde06ee617		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F90D 19712 bytes

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