Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d04e2bf38a5ded5…

MALICIOUS

PDF

80.9 KB Created: 2021-09-05 23:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2d15e3dfd9c4680ab068dad0c18c705 SHA-1: a5e976d86f0c0f80fca01d4c0ad3647526640af3 SHA-256: 4d04e2bf38a5ded56773852f760c4bfd36594d625dd3945f69c8a4888e49b7bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to potentially compromised websites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and link farms indicates an attempt to redirect users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/fbb221cc08b34e6ca51687228b9387cb/tokokuwubofesibezariva.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2dacb9544ede92917ef6d478351df59a/53333645220.pdf
    • http://work4shop.cz/userfiles/file/risibu.pdf
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/94414613719.pdf
    • http://ctyrkolky-gamax.cz/data/dokumenty/82728233021.pdf
    • http://php-lounge.de/userfiles/file/71886655883.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/76fgbvgq6kuqh1dgpi64fro7d1/34341683741.pdf
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/berobevufituzabanozuj.pdf
    • http://tavio.su/files/file/wuwozizi.pdf
    • http://vinhhangvien.com/upload/files/35791998462.pdf
    • https://ms02bet.com/contents//files/36877667009.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/cde421439c3e5ff2cf69047a6465704d/xevenebufu.pdf
    • https://accounting789.com/ThImg/file/muregodapusepafefimoso.pdf
    • http://simonide.org/userfiles/file/dosagesoxixodaz.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfcd4d3443---koverawuvunotavifagox.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d23e944e82---25880275660.pdf
    • http://abwlargo.com/uploads/files/fasaposejefuwega.pdf
    • http://ukkies.be/userfiles/file/27419953739.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/84743c95030bd25321c4287b2baf2559/fovoperanuxizoluzatomi.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c14fad3a3e---jidivivoxajubowuk.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/0utrsu8673cmucb7pe1tbnd65c/64019565871.pdf
    • http://holzbau-napetschnig.at/lofarelirexugulafulu.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16127755e8a192---zixolatumajiruzulugigez.pdf
    • https://didacostruzioni.it/userfiles/file/88649639378.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=libros+de+mentalismo+pdf+descargar+gratis
    • 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_off0000d200.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD200 16792 bytes
font_01_sfnt_off0000ea17.bin
b9a9c81945cd4c5ddbcc5abc9d6eb6be952b889b0d913a99ed66109c21dfb84f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA17 11060 bytes
font_02_sfnt_off00010368.bin
ffcad0d65b70a8682331ad9be2ee746dea1f8c811b36461b96d7a7950a999908
pdf-font-stream PDF embedded font (sfnt) at offset 0x10368 19804 bytes