Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4e1a84a5866128…

MALICIOUS

PDF

88.5 KB Created: 2021-06-27 15:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 157ce4de4cf1b864f9090f6cb8ba8c79 SHA-1: 6bebc8e12efe4efa91cd050a7a3523241674d6b9 SHA-256: 7d4e1a84a5866128ea174cdfd1f25399418e4df357c3a2fb583045a55e207aa6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links pointing to compromised CMS uploads and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to external malicious sites, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/q7f2o0tt4mu7k4niod0874i41l/bepuvobefezu.pdf
    • https://hrmconsulting.biz/upload/files/23103702771.pdf
    • http://qca.ch/userfiles/file/81985815034.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e87176fd8---wesilu.pdf
    • http://technoculture.cz/admin/upload/file/bepudakana.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/f2df323f03ca9083c119e8a07a5cd8e8/3826553588.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/vonozizasiresajefipif.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc8e045750---xaxexowemaxasojejigiwem.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0308d4e53---96131476843.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160acbb8d3a5cd---71735561283.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160914a8e424cd---kudazoxafuguzijoperuti.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16085d88c958e2---74384736767.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/158d241cb5c82e5f0b5669435b09fd9c/23071085854.pdf
    • https://infoenergie-loire.org/userfiles/file/xiwawepofivujawur.pdf
    • https://spheresignal.com/app/webroot/userfiles/files/90239162669.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9ce80e8dd---xugezunadepiwepol.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805d6e954f4---vavozinotoditifili.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a2addda1252---samagosasomituj.pdf
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/43567825804.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/pedutadenalafo.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/bj4o0glak75p605jds2glcnriq/29718183308.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/7b1qe04uviqkmomv0at2g5hlj4/60621489932.pdf
    • https://gadd-asso.org/userfiles/file/muvowevon.pdf
    • https://twr1115.net/files/fckeditor/file/makukevedilajasopedugeba.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a9de72ebc---54484205699.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/57bf35b03862a0027d7980edd6ffcdf4/35287645307.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/9bfc6e63bfca00343160a96e7eb2c94b/36680982842.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=signs+of+mumps+in+child
    • 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_off0000f9e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E0 16792 bytes
font_01_sfnt_off000111f7.bin
42f9c0ea478030e60b9a0d9c48ec872423368a66646f670fdd36bb92993eefcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111F7 10752 bytes
font_02_sfnt_off00012a2d.bin
61514a9a543a1ed5b554e214e1ac03cabcfd23ee4f197101b1f87f5c023bb858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2D 16428 bytes

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