Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94cb145301de04a…

MALICIOUS

PDF

77.3 KB Created: 2021-07-13 08:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a96a99f5bfbead0a4435af0c3c1ef33a SHA-1: 40358522d06113e00202aef06384969e12a774ec SHA-256: a94cb145301de04a24327a6d9c6165090cc67c33bf8913e78baac8dc87d014ae
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that redirects to a suspicious domain, disguised as a search result. The PDF structure and embedded objects suggest it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/square?utm_term=minecraft+how+to+find+treasure+chests+easily
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7edbca431ed42d2fca356/1625812412560/juborefozeditigidimuw.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e80758efb14d112213127d/1625818968863/90497398489.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed190ebde79631d33ba43d/1626151183176/wemamopudezigubarekoxed.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed1c34bc85f73bac243190/1626151988838/71421187954.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecd208526e290873849625/1626133000307/bukewimamugalanamizow.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8f5e38ce0e10532d0ead4/1625880036014/how_to_undisable_iphone_8_plus.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e90615c14ff043cd5bbf9a/1625884181283/83208064513.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91977c91b61347ea3643e/1625889143751/jetom.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_off0000ccdc.bin
dba806ca427f27d04ecc076d4ff65e9971d6f342436eb18cd7c44dc5a36401cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDC 16504 bytes
font_01_sfnt_off0000f7da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 16792 bytes
font_02_sfnt_off00010ff1.bin
caa8056471e16d0a9c602add2a9e7fc7caf1c253a3f4639fde5ddaf488176bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF1 10864 bytes

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