Malicious PDF — malware analysis report

Static analysis result for SHA-256 a25a593b3af95cd1…

MALICIOUS

PDF

75.2 KB Created: 2021-07-13 18:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88ce31d6b6690fd3ddeb1994d874f0e2 SHA-1: f94168660a1dbe9bc69e984b3e460f321d39e22d SHA-256: a25a593b3af95cd1cc4203182cfa1fc2abc5a34994a2be54e1c619a62609a6df
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that, despite being labeled as benign, is part of a lure to download content, potentially related to 'minecraft for pc download windows 7'. The presence of embedded fonts and the PDF structure suggest it's designed to exploit PDF vulnerabilities or deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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/~3/4aHNpQc2m6I/square?utm_term=minecraft+for+pc+download+windows+7
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7d0431b0b43e07e62558/1626111236708/xidofepofot.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed9447881afe0f0ceb0d36/1626182727201/copy_file_to_excel.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e81ad25c13cc4feded47ba/1625823954674/salejapeb.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e84fecda5f466f286f784f/1625837548673/easy_goulash_with_corn.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edaca83680ef421b562ca2/1626188968492/nujalojuxovatigabujeka.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec93943631fd4ab817812c/1626117012254/i_am_unmotivated_to_study.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e91ee02210ba6bce121210/1625890528638/36049378590.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8a92a37faa2302622cbd4/1625860394123/ast_and_alp.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_off0000c5ba.bin
aa265914c6ea09d61e537ed91c8b077760163d1dad5ec4efbc9083d03c6d591d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BA 16220 bytes
font_01_sfnt_off0000ef98.bin
e423df4129bd35deae709752bc650a87c560928bab7a50d2c74d978e01f2d639		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF98 10744 bytes
font_02_sfnt_off0001088e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 16792 bytes

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