Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab73082113fa405…

MALICIOUS

PDF

91.2 KB Created: 2021-07-12 21:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 489dd8296627b98965b687aa7f492eb4 SHA-1: 98e9d9e76edb979d015558c8da340515c95fb77e SHA-256: 6ab73082113fa4055c5ae4df3fbeb9301dd52461562184aa2aaa1ac1136fbdad
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with the signature Pdf.Phishing.Trojan. The PDF contains an embedded URL pointing to 'https://huntic.ru/square?utm_term=how+to+sell+bunker+gta+5', which is likely part of a phishing attempt. No scripts were extracted, but the presence of an external URI and the ClamAV signature suggest a phishing or trojanized document.

Machine Learning

  • Nyx PDF Classifier clean score 0.1448

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://huntic.ru/square?utm_term=how+to+sell+bunker+gta+5 PDF link annotation
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9163a5fa2eb14b90b41bd/1625888314747/gufemirazenowixamewojujo.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7b8ec7e45264421f6f2b3/1625798892496/antoinette_and_dingdong.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 10732 bytes
SHA-256: 11887af460da2c9dcfe26af173a64578b24c871c34b4b6fec8ff359817c225b8
font_01_sfnt_off00011bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEE 17364 bytes
SHA-256: 85b19492a9dfdcf0ffdce0f2f4d594f001c02231511d8af4a60eca62336856c3
font_02_sfnt_off00014975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14975 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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