Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0c5698efc77b99…

MALICIOUS

PDF

78.1 KB Created: 2021-07-12 20:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 97e85009386008c7a8f82fd8c51ec9d4 SHA-1: 19c8e417bd77fb4c9b3721bb831bccd216aa374c SHA-256: 7b0c5698efc77b998cee72b8d982092d486deedab410d82432906b3dd90646c3
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV with a signature indicating phishing and trojan activity. It contains an embedded URL that, while marked as benign in this analysis, is part of the lure. The PDF structure and embedded content suggest an attempt to exploit user interaction via a link, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier clean score 0.1551

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/razvivatel/yapz/~3/UkUWPC8UKDU/square?utm_term=search+my+phone+app
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec78e95f604029b9905ddf/1626110185637/lefum.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_off0000d0db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 16792 bytes
font_01_sfnt_off0000e8ed.bin
e9dbffabda0ecbbb533f2cbd270e4bd36c080dda750abade587d81d2eb91c080		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8ED 17112 bytes
font_02_sfnt_off000115aa.bin
fe01a83c48757c144d41113d4cf5df8f550d5557befa4fb937ab533212cd419a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115AA 10424 bytes

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