Malicious PDF — malware analysis report

Static analysis result for SHA-256 81282edfe77cfce2…

MALICIOUS

PDF

74.8 KB Created: 2021-07-13 01:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2082098ec2da06acace570ddd1ee96b8 SHA-1: 56fd663a288fbd84d2d1c759c5600a6b6a1097e9 SHA-256: 81282edfe77cfce22350b8c1a0910c1ff3955700a29b98deab2409d41d4f57ce
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that, while currently flagged as benign, is indicative of a phishing attempt. The PDF structure and heuristics suggest it is designed to redirect users to external content, likely a malicious or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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/sq/ugae/~3/v-xubMviL4Y/square?utm_term=life+cycle+of+hen+project
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e95bd16e267257943c93cb/1625906130039/98853513306.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e81cf2dbc52028c84211e6/1625824498476/will_grass_seed_grow_in_winter.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec84f70d838b6c850d0fef/1626113272067/electronic_devices_floyd.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_off0000c473.bin
d62596ae5a2000121470e6f81b8cf4524bff18c52ecf97725c7ae696c33e87a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC473 16688 bytes
font_01_sfnt_off0000efe4.bin
5933a2643ceb14626834b4727a99305c2d9baea4b2a0653cfb2ba5b85f8b0659		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE4 10448 bytes
font_02_sfnt_off00010777.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 16792 bytes

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