Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e16016b0f2bfb1…

MALICIOUS

PDF

75.7 KB Created: 2021-07-12 22:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac83506456e390d433ca09675d911c49 SHA-1: 960f76ae6d3a64dcbd4482ed427eac6b46bd9aff SHA-256: 99e16016b0f2bfb1bfae3b744bab0a029de391a8bec5b7847b1b89645bf408f6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that leads to a suspicious domain, likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of an external URI suggests an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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://queure.ru/square?utm_term=how+to+heal+bite+in+mouth
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7e176ad76c09748fa5c3/1626111511615/koxonurixaxerasumil.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8ad00ee85211156d4ec53/1625861376111/whats_smaller_than_an_atom.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8f2a0e7a3c5fba3e5b57/1626115882375/25398655233.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e87b437a53a23ddeb23e86/1625848643635/25450083653.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7fd55c244202458b2074/1626111957772/warframe_how_to_trade_without_dojo.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8a52f89f8e700bf8256c/1626114642883/2k20_wwe_for_android.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7da34c0b954f9ea39fef/1626111395249/below_her_mouth_on_123movies.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d0b3a15ec47e081835a6/1625870515493/xikolibaburilijowej.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_off0000ca57.bin
7826a0e74065092060190d90a30565b88da2bddb432c33c53d767e30cd0734d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA57 10420 bytes
font_01_sfnt_off0000e1bb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BB 16792 bytes
font_02_sfnt_off0000f9cd.bin
2b1c33c33ce1c9ae57c74b81c852b80d238fc9f73d436edf5c6b7e94773964d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 16012 bytes

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