Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16299cb240e98ed…

MALICIOUS

PDF

72.7 KB Created: 2021-07-12 22:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4a2d81a6cc72ee91b870299b7050e1e8 SHA-1: e549bcfa5862174736dcf3164d01932283f8845c SHA-256: a16299cb240e98edeadb4a41dc7c4d0e3f3502489ab9c16440453d228366280b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or social engineering lure. The presence of external URIs suggests an attempt to redirect the user to a malicious site or download further payloads. No scripts were extracted from this sample, limiting the ability to determine the exact execution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8216

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/pL_UGxDroB4/square?utm_term=htc+touch+pro+manual
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8ce308f67167615ad0a7a/1625869872402/instant_to_word_converter_online_free.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e94691085b1c120f995b49/1625900689497/68957776694.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90212c4c1a734c5d57c4b/1625883154784/48304690016.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e91312fc46b15058279cb2/1625887506264/gesasojebeniwirepuwuboj.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec807acc97682122426ef7/1626112122921/from_the_point_of_view.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_off0000bcc6.bin
e570e545e28427f99842b14c73341d93cbf1944fd3b5b7c5c96b8c67188994e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC6 16452 bytes
font_01_sfnt_off0000e7f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F6 16792 bytes
font_02_sfnt_off0001000d.bin
a8c82d718c38dc7eb94346bfa5a8ab501889e6bc837c8a235f022b18dcb00b0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1000D 10340 bytes

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