Malicious PDF — malware analysis report

Static analysis result for SHA-256 a696c9c8821bf16a…

MALICIOUS

PDF

80.1 KB Created: 2021-07-20 22:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cfc70cc00b68f27d3c2ea8f0fc82cfa6 SHA-1: 04c161e2c1eda833b9a4a6b90aee0e4cbcdb9754 SHA-256: a696c9c8821bf16a1a93c8476bddb9b7d8015371a99c9dceecb4114d63f56b26
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as a phishing trojan. The presence of embedded URLs, although many are marked as benign, suggests an attempt to lure the user to external resources. The file's structure also indicates potential exploitation of PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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/gPkW7oTCsL0/square?utm_term=toy+story+sheep+girl
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e940af085b1c120f992eac/1625899183696/at_your_feet.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8d92a78606b4d18578b59/1625872682561/48855963499.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3086a7f94c710fbc1ae96/1626540138505/lobuxamobo.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f46172952f835132df8358/1626628467135/62122544342.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f234e4c3a5203ac9a54c4a/1626485988552/easy_pasta_salad_with_mayo.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f625f4b2b0835cff962cbc/1626744308391/57415338450.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee2e87c27d1e40a54939d7/1626222216039/minexoluravuwufat.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee857b2ee8b51fd9394aae/1626244475851/nogikub.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8d4205183b3b579df498/1626115394522/45007473270.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f170b0e013e242e7170f02/1626435760200/79808172897.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_off0000da31.bin
5ca9251fdd61fa161f75cb7560d1ff02027a6de81a6ffedf6473f9e30385292b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA31 10344 bytes
font_01_sfnt_off0000f1b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B5 16792 bytes
font_02_sfnt_off000109c7.bin
262f0aa7e030ffa3d55510d811b1ee50ab13937bcfcf08fab2be775005905351
pdf-font-stream PDF embedded font (sfnt) at offset 0x109C7 16496 bytes