Malicious PDF — malware analysis report

Static analysis result for SHA-256 82fdb0a4f25fc972…

MALICIOUS

PDF

77.4 KB Created: 2021-07-17 11:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3d2d98c4a61badf0ab6a3d1974f3f32 SHA-1: 55e20fadf5236353f248d2dad1ae6ff4f565dd23 SHA-256: 82fdb0a4f25fc972c02a87aa6612c938068ccc7720bb4f467e6bc985341247aa
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. The file contains multiple embedded URLs, one of which is flagged as potentially malicious, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/UZrB20b2Dcg/square?utm_term=sequence+and+series+jee+notes
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0d93e9392da325e927a81/1626396991013/hairstyles_for_shoulder_length_hair.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edc7eaa50f6e33a321c044/1626195946165/erectile_dysfunction_before_30.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_off0000c9fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FA 16792 bytes
font_01_sfnt_off0000e211.bin
b46b65984e75cdfeb21334a28fb87477cc8ecdd38a2f58e65a22c65e2b4c55b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 10768 bytes
font_02_sfnt_off0000fab6.bin
f2ae1135a27726ddaf120f76eaec32bfc7eac54bea5a41db60dd812661d5ff3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB6 17416 bytes

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