Malicious PDF — malware analysis report

Static analysis result for SHA-256 909795adba6c9ff5…

MALICIOUS

PDF

73.5 KB Created: 2021-07-14 07:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e919423fd4c5a3220cb86790b938d45e SHA-1: 805c1ced7a7c3617e5d4d64dc395e9cf64988d8f SHA-256: 909795adba6c9ff5119cae3b261d230abae5e7933391a3af3b0eb02b3668be13
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV with the signature Pdf.Phishing.Trojan. An embedded URL points to a suspicious domain, likely intended for phishing. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier clean score 0.2401

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://krisoc.ru/square?utm_term=bookmarks+for+pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8c4ca596d362fd0fbff17/1625867466710/64667689943.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7b2cc8b0d544b6d6c653/1626110764614/letter_of_recommendation_for_military_enlistment.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_off0000bec6.bin
90dbd437584e5994ed084a155dc8a3dbd16e16d1815e03a3a73ef062cd611401		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC6 10332 bytes
font_01_sfnt_off0000d61b.bin
023aca5fd50a3fbea8fb6a80fd80889e552c32b7a11037baa493c83b1b367b06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD61B 16540 bytes
font_02_sfnt_off00010121.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10121 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.