Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5bfd4ab1062f70…

MALICIOUS

PDF

74.5 KB Created: 2021-05-20 02:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20f6ab2fc6310925a495e911e57e660e SHA-1: 5eebacc4afb99e25d23251819bf715d930df421b SHA-256: 7d5bfd4ab1062f70048991a3fe7152dba143ee13ff3ce5966993640b249df41d
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF identified as malicious by ML classifiers and ClamAV, with a heuristic indicating a fake invoice or payment lure. The embedded URL, 'https://allytemp.ru/uplcv?utm_term=multi-step+equations+coloring+worksheet+pdf', suggests the document is designed to trick users into downloading further malicious content under the guise of an educational worksheet. No scripts were extracted, but the PDF structure itself is indicative of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://allytemp.ru/uplcv?utm_term=multi-step+equations+coloring+worksheet+pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/0s0vb6s59sis50jsq1irtegl17/kumeruxepirezanopejolovum.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/8o445a5bapds30boctuio9dq70/66258281739.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/dpb75dgbfev01b1hslff8ql8na/47657618941.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/1efbd7d9f8c2c3b0a5218d1f32a69477/31984850481.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608141c6dee16---dikokal.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd796b0f6d---3830622756.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/kimedigukusakopuzabenopu.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/bd0b1386c83917641ca85dabf1ecf854/geligubanisoreme.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/0a22456df134246b7dfa352f551f80a5/vijevadam.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609550c5b4382---sabimafuxibifebaz.pdf
    • http://aqbnb.com/uploadfile/file/32685806037.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077ff45af869---suzuzinirimebe.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/6950d2b232aeaf093e6d4c9f28a86593/54889759657.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734f4a38580---94171456275.pdf
    • http://watthaistuttgart.de/userfiles/file/12480813978.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/6468b47bacdf530079d0fd29c01f8f0c/22918189082.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983d482d9a8---kazukurovipukeb.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3a9ea94e2---34945163540.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc22a65937---duwevexotejit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c9.bin
268657a9688e6cfcb6e3ab67a1ee3482fbf47368369947d0d646a2267a3e960a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C9 5736 bytes
font_01_sfnt_off0000f767.bin
c3fd8fa1a599dd00b0542f08e2c5087a961410ce1dc695bbe41bf75d36f2b22f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF767 10944 bytes

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