Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ffe2dbed61d4e6…

MALICIOUS

PDF

86.4 KB Created: 2021-07-14 05:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1a4ab1a6ce5cc85b14f907b9d5bbb80c SHA-1: 145b4956b6f08351e77d319442e86094e5258b48 SHA-256: 48ffe2dbed61d4e600dc18fe481363137122494a02547779f7d9a3c974d89da9
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an external URI pointing to 'https://laborke.ru/square?utm_term=soy+lecithin+is+it+bad+for+you', which is likely a lure for a phishing or malware download attempt. The presence of a visual download button heuristic further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6304

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/square?utm_term=soy+lecithin+is+it+bad+for+you
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d5cbb166174ac2d70cdb/1625871819661/88195777639.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e84dd3eb86f75767dd7f29/1625837011601/77792904873.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e91fffe6a58043b69197e8/1625890815331/incubation_period_of_aids.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecf4f33b21860fe66b326e/1626141939991/one_two_three_four_five_once_i_caught_a_fish_alive_song.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_off0000ecb4.bin
918280dda0f3caf0cdc264d246118ece92557315bea6858bc9b3fb7474b3b184		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECB4 17648 bytes
font_01_sfnt_off00011afa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFA 16792 bytes
font_02_sfnt_off00013311.bin
138ea36568e88c33cfbc331ffd9adcc19e6c30d15a3d79981142b94128aac789		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13311 11000 bytes

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