Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a0a1582cd2ff32…

MALICIOUS

PDF

80.6 KB Created: 2021-07-12 21:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e40412a3eb60dbb28060442054e796f SHA-1: 989dbb8dc5f55f185e4ae618167ab125e66f593d SHA-256: b1a0a1582cd2ff320db8e407acf2398b2aa4adffcb6a32a11f5d7c89adb8ccd5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to trick the user into visiting a phishing site. No scripts were extracted, but the presence of the URL and the high confidence detection indicate a phishing attempt.

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://queure.ru/square?utm_term=ripping+small+pieces+on+table+saw
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7d4319a16f038d61a56c/1626111299624/88302870026.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8cc34c5d9771337095075/1625869365093/db_window_cleaning.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e961d8f4fe78435a3c7f7b/1625907672792/73564160728.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e82afe25441e1b37892c3d/1625828094852/67077861020.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec81e84027437375965650/1626112488282/xegize.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7fc5da3609a707bad755d/1625816157548/vemebibubumovuvuk.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec72d8b8cbe518df564858/1626108632253/aldactone_100_mg_for_hair_loss.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7a87657d2352c92797d3a/1625794678511/30305063840.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_off0000d938.bin
1f7a8c7de00209ef3686a270daef07017b96fb3fc101d74f17c9e0ccae62952d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD938 10888 bytes
font_01_sfnt_off0000f236.bin
834647d3bf999664aa79bf1c41e448d55f64e08adf99b5edcf32d55bc72c9571		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF236 16844 bytes
font_02_sfnt_off00011e49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E49 16792 bytes

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