Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d9251db52ab1db…

MALICIOUS

PDF

70.2 KB Created: 2021-07-17 22:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d81f360ddbd6255ee5829693dd29a522 SHA-1: 5c6e0bfe8d1c73be2588f477f8cb1f3f7951a883 SHA-256: 32d9251db52ab1db525b76f76bb243e304c129c1e91d03c9294a91b3e9870971
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified the file as Pdf.Phishing.Trojan, indicating a phishing attempt. The embedded URL, disguised as a Google feed link, further supports this, aiming to trick users into visiting a potentially malicious site. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier clean score 0.1587

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/sq/ugae/~3/cEZ-xJcQpFE/square?utm_term=small+and+delicate+synonym PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f24461d68f3225904e4a84/1626489953186/more_than_ogive.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_off0000b0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A0 10620 bytes
SHA-256: b6e42dad6064053d812ef424305afff8db3962ff4e412efb23af6dbd9ad46e5b
font_01_sfnt_off0000c8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D9 16772 bytes
SHA-256: 5b47edc2c3d1bd80aa060ec062fa728f2a5da5718d8daed5767d72c9a5c1c38b
font_02_sfnt_off0000f3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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