Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e1fee9fe8e7a34…

MALICIOUS

PDF

89.4 KB Created: 2021-07-13 23:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d7c4971654391298e4b83e290330627 SHA-1: a288666ca76e7c8cc90a62c7fac85e54fffb675a SHA-256: c0e1fee9fe8e7a342b0b73a5d5760591d63fe55beb876fa667bcba5232808edf
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. ClamAV detection confirms the malicious nature of the file, identifying it as a phishing trojan. While no scripts were directly extracted, the presence of an external URI and the ClamAV signature suggest an attempt to redirect users to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier clean score 0.1448

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://infrive.ru/square?utm_term=how+to+check+a+snap+story+without+them+knowing
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eda5558525735ba0d253c4/1626187093464/11294357043.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed8908c76d6b0ba00f1108/1626179848631/pernicious_meaning_in_kannada.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_off0000fb98.bin
e4a9804f316cbc044ee934b5e92857deb07adb8cab4ac47a54d7144d6d76cb4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB98 11160 bytes
font_01_sfnt_off00011593.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11593 16792 bytes
font_02_sfnt_off00012da5.bin
3a7221e601dcff7cf0e6a51d645adb4e4dc83a1abcc09970405b1c6be4bf4019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA5 17104 bytes

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