Malicious PDF — malware analysis report

Static analysis result for SHA-256 76512c253958d4d6…

MALICIOUS

PDF

110.9 KB Created: 2021-07-13 22:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff1b3d6cd717543ca2d541fd5a1a4795 SHA-1: d0a5e70e1b5c84895a25d00e6098f0891b10d67a SHA-256: 76512c253958d4d614b2561d8ddcf448f9a971cfc617e119db66e715c32c9430
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan, indicating malicious intent. It contains embedded URLs, suggesting it may attempt to redirect the user to malicious sites or download further payloads. The PDF structure also shows signs of manipulation with duplicate object bodies, which can be used to hide malicious code.

Machine Learning

  • Nyx PDF Classifier clean score 0.0235

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/~3/9xivtwLAy4k/square?utm_term=meaning+of+hail+in+english
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8b44949b7892017cdb50f/1625863241649/best_mods_for_crucible_destiny_2.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edacbc151a035e9e7d4756/1626188988530/another_word_for_expedite.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b5c.bin
c394ab027b9f905301426bc251a5971de3c4e20f12524fcaf03b6083cd8bda0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5C 20796 bytes
font_01_sfnt_off0001604f.bin
8cea7e111fe2f973a10a7b9404f9124d41daa96e59b89b01729e82a4486d09e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1604F 10288 bytes
font_02_sfnt_off00017753.bin
4735c0eaac444a1f171d9d53f09a0fd2029ec9f9bae3ce92ef256aa025d0df64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17753 16312 bytes
font_03_sfnt_off00018da0.bin
51f4301d8327012b531c178b3b8c29e81c46278db1dc1674d01c7118b75e55b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18DA0 2096 bytes
font_04_sfnt_off0001970e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1970E 16792 bytes

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