Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3cabefae275046…

MALICIOUS

PDF

86.7 KB Created: 2021-07-22 01:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe99130ba8248d8731e3a2e842659f97 SHA-1: 5f1a900c51ee1858609bbdd779a4014cc6a36c8b SHA-256: 9f3cabefae27504653c7f2a4ec8780c3d2039ddd6f1fcda6d94618b015eb7663
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or credential harvesting. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, consistent with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://irlanc.ru/square?utm_term=business+quiz+questions+and+answers+with+options
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f5bac002e819217d975f2b/1626716865028/sefirugajatizawapurired.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f852404e03100db5d95b22/1626886720943/21214262772.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed9362fb5306426ed0f7da/1626182498381/pareruzalazobuz.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f53a9823bf9c1bcafd2144/1626684056504/chloe_x_halle_where_is_the_love.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7d0c0cf33f708d79b687/1626111244280/19049470625.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f421a8b386920ff6d3ee80/1626612136349/difference_between_direct_and_representative_democracy.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ece7f4fb5306426ec7da05/1626138613131/recently_asked_ielts_essay.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee9614fb3cc800db5a2a39/1626248724585/tiwijenusuk.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f12811008c226a942571f2/1626417169599/sexupititajesijije.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f74ce94a159e2afcd2d676/1626819817767/86574738402.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f75fd904fe91596f11b272/1626824666057/20677009430.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7f3fe57d2352c927d77ed/1625814014248/71008548509.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee2cbc0981f36585a0ddec/1626221756548/93045469644.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8ec84309bd63f3d838f69/1625877636528/what_is_a_central_angle.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f6f8746a070656fd066269/1626798196390/ancient_chinese_civilization.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f834a035140930a792f549/1626879136983/i_want_to_dance_in_the_dark.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f2131fde9f7d6ab7aeaa76/1626477343366/verimemogo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e9228ec14ff043cd5cfe96/1625891470266/wevodujikidawisu.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0eb8f1d6532080098d194/1626401680207/divergence_and_curl_of_magnetic_field.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_off0000f17c.bin
471d689cda2797a120d34c36ad06d19cb8ff5f00863f333a103e04ac6b3bb6d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 16296 bytes
font_01_sfnt_off00011b99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B99 16792 bytes
font_02_sfnt_off000133b0.bin
5ff339247eb4b468af81b9b1ea073c14a77f2a9933a40849e238efa479fdd4cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133B0 10888 bytes

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