PDF malware analysis — malicious · a089500b17f6ff7f

MALICIOUS

PDF

79.9 KB Created: 2021-07-16 00:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: f4647ce028e3cd708993d14d446cc3a2 SHA-1: c25b3e8024114d16eb9d8241748fb49ac06be4a5 SHA-256: a089500b17f6ff7f95196dc5017de909be932ad85d1a02382a69bd498aa92e0e

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability or employs social engineering. The presence of embedded URLs, though many are confirmed benign, suggests an attempt to redirect the user to malicious content or download further payloads. The file's metadata indicates it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9511

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/razvivatel/yapz/~3/UZrB20b2Dcg/square?utm_term=hypertonic+and+hypotonic+definition
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8c04bf311dc752b0a0843/1625866315712/continuing_professional_education_credit.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee867f02e0767984f77de3/1626244735472/neverending_story_meaning.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eff40d5740a719f4ab9862/1626338317460/77727005634.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8687bcdad2f34d7ec7d8e/1625843835655/hang_me_out_to_dry.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed692b37bee829a2892d98/1626171691463/fozavaxediwejodunimasuj.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0a726800d3a563ed70bf4/1626384166789/fumimufaz.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9178e8fb24157da6fb662/1625888654751/39348338772.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9f9daf807f1e15280a8c/1626120094031/52417433486.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d6d1.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6D1	16792 bytes
`font_01_sfnt_off0000eee8.bin` `161cca10cdaa44a13ec52af7494156d04b68dec882bf01cf113ac14e787dfa37`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEE8	10608 bytes
`font_02_sfnt_off00010707.bin` `510002af52ddbe4f33d30c4b3f9ed8518621513c11128531f765ac14cee4ed3b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10707	17004 bytes

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