Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc69be91f3d813d…

MALICIOUS

PDF

74.6 KB Created: 2021-07-20 11:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f9215d554324889e69ba33a948160431 SHA-1: 986496c2cac36a6f484cbe831819e0c65957a2b0 SHA-256: 9fc69be91f3d813d4653a50dff4804677a34d8cb7c0545c754b485589fc0fa6c
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, and it contains heuristics indicating it's a fake invoice or payment lure. The document embeds a URL that likely leads to a malicious payload or phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7395

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://queure.ru/square?utm_term=10+hours+under+anesthesia
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92d54b132fa362073ea92/1625894228231/filling_a_check_out.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8116345e16b3be7ebecb9/1625821539955/onions_and_garlic.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8286a3e9df788e6d4cc4/1626112646113/75333901168.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_off0000c225.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC225 16792 bytes
font_01_sfnt_off0000da37.bin
46482db2d80d849251723a13cb150e8a071c45860e83892c1112b1fa3ab25385		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 16612 bytes
font_02_sfnt_off0001055f.bin
cf981469cfa724dc9e22a5f64a34ddcacbf99e734f1cb048576e2055883c1be9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1055F 10476 bytes

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