Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c06654620acf4da…

MALICIOUS

PDF

75.1 KB Created: 2021-07-13 16:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 558ba22c5469451ff6d36314e8f1efbd SHA-1: 6183ddf4773b0635b6c60146ac71fbc9007bc662 SHA-256: 6c06654620acf4da06e719b3a1a4d65bb88be3d322b175a1509fe74497592253
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://synerhu.ru/square?utm_term=how+to+unblock+friend+on+messenger', which is likely a phishing or malware distribution site. The PDF structure and embedded content suggest it is designed to trick users into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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://synerhu.ru/square?utm_term=how+to+unblock+friend+on+messenger
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e85fb1f8c38436265600d8/1625841585921/muzadunagetanikaxa.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed8a1750bb312daecf9d4b/1626180119892/mubiruvevivewejelideb.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7fc0dd0799e4214c1b34e/1625816077315/30950285618.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed1e546bb85f4a8d8363b7/1626152533009/where_do_living_things_get_their_energy_from.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e76b8e26d1b15707cef91e/1625779086648/gilligans_theory_of_moral_development.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec84b7dcef4a49b3ab0384/1626113207783/mp4_3gp_video_download.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed6065c439f82871643ca3/1626169445452/barimulade.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_off0000c3fd.bin
ba1b521dbace04db445e1d456d8ea21182b704288e140310659ee43f5659ffe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FD 16460 bytes
font_01_sfnt_off0000eead.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAD 16792 bytes
font_02_sfnt_off000106c4.bin
0a909e69d3f6dc17cdc5433c6ce7f4d91b1a21a360da93b0fc7d0aa244992cd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106C4 11068 bytes

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