Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ec653c6f290cb7…

MALICIOUS

PDF

74.7 KB Created: 2021-07-16 07:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 32c31a5aee02d8f3983ae0220db90001 SHA-1: 9388de1d45861882a2a5e496df81836b245248d1 SHA-256: 09ec653c6f290cb78da1459aed97827173801dbf1d4c30e361fa1841eb220d10
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan', indicating a malicious intent. The presence of embedded URLs, even if some are marked as benign, suggests an attempt to redirect the user. The PDF structure itself is also noted as having duplicate objects, which can be a technique used to evade detection or obfuscate malicious content. The primary attack vector is likely spearphishing, with the PDF acting as an attachment designed to lure the user to external malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2593

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/IdU8rIDf9lQ/square?utm_term=high+pcv+count PDF link annotation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ecf209f9a98d6db3a7741f/1626141193432/titagudazakano.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edc18937ddb5439bf3ec75/1626194313292/ruralasesevuwamiwideb.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_off0000c70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1C 16512 bytes
SHA-256: 47daebf2a28e083292374200eb47cb09029f6d8c92da45bee45d4b0dbcf7faf4
font_02_sfnt_off000109c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C0 10200 bytes
SHA-256: 9ec50670766191a72e5efab508c98fa45baf32b70d5ebd2674f411a57566a9c7

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