Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7498bedf984b8b1…

MALICIOUS

PDF

77.6 KB Created: 2021-07-16 18:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a069eecc8682a0c4fc8e5ac18abe0e56 SHA-1: a63f1b5975181261a13655bf9cd2d3cf4e8d4589 SHA-256: e7498bedf984b8b1906ba12b37a6fe36959c2ba7790794c49b8467ce3baf2078
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest an intent to deliver a malicious payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9001

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/k6oGaauGqGM/square?utm_term=how+to+get+one+thousand+voices+destiny+2
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e9418a8ce0e10532d3afc9/1625899402554/60065055347.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f18ce0d73e147f6096cbfb/1626442977046/zigofufuzoloregeza.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee6ed97426fb5109f7a2b4/1626238681387/56922318631.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0c64506e5cb5c825f5034/1626392133969/hypothesis_in_machine_learning.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e953d3f229ba2ea8387e0b/1625904083411/frittata_recipe_without_cast_iron_skillet.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_off0000cbd5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD5 16792 bytes
font_01_sfnt_off0000e3e7.bin
78662b3114da1c45bc198594182ad181632d314aec93854f1926793f2993a2c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E7 17368 bytes
font_02_sfnt_off0001115d.bin
37d0f295c61ec0fb85678429a9e843af3621b13ac2e2d6ce7e8d7ae2c2a35bbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1115D 10980 bytes

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