Malicious PDF — malware analysis report

Static analysis result for SHA-256 503b7fe4cb695661…

MALICIOUS

PDF

72.6 KB Created: 2021-07-16 05:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c3e3558a5c91e1350f41f248dd65395 SHA-1: 7198ca4d2aa245fbc6ddf8b15f5f26e65ab0108d SHA-256: 503b7fe4cb695661e8ee964e16e9564facb7acad39a88db503f837ba25e4d07b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, for malicious content. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic specifically indicates the document's purpose is to deceive users with a fake lottery or parcel scam. The embedded URLs, while mostly benign, are part of the lure mechanism to direct users to fraudulent content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6583

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/AG-UZpNbJGc/square?utm_term=diary+of+a+wimpy+kid+rodrick+rules+online
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e93236c91b61347ea444ac/1625895478161/wefid.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8f607563c1506a8b439ab/1625880071459/kovozenewaviroviv.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8634951932f3553d73614/1625842505860/sugusolujelemud.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_off0000bb27.bin
d2c6a0004796118726abffb4fd5ea849feabf1b4892a00282921e64bd2080318		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB27 15976 bytes
font_01_sfnt_off0000e4a8.bin
747ab0de64d81d8dbfb682469ee390730de766f9a0be832e15ef228b11e8e3fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A8 11076 bytes
font_02_sfnt_off0000fe84.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE84 16792 bytes

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