Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2d8eb36d34cfd6…

MALICIOUS

PDF

85.3 KB Created: 2021-08-07 06:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f3ad2138fe9d94550180e8633baefa98 SHA-1: b3c31e7786e34be1e333e131b6bfd977984b7c0b SHA-256: ba2d8eb36d34cfd677fec442b5a64591703fa1fd3a2dcf2ea4e1255aa7b7ddb7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://macabrey-luthier.fr/data/Files/letijuwika.pdf In PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/diwede.pdfIn PDF document text
    • http://simpelms.nl/userfiles//files/12693625873.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cfbdccbab---50021770273.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/07/files/210728004236.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3960422fd5---fupomamifowazilavasemibob.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/mobalewuwadunexisomarakis.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085cbd5563d0---81634721814.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bijon.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/mipusefaviz.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d61f9e77f5---defelesuwojitoxiduluwidi.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160897b572b1b8---vujubetebi.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/xokonabugi.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/92157207435.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/zudorikexedezamowidajuw.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/8017644592.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761280d2bc6---kikijetebeteruwep.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe3a70984e---pusaletujimuja.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/9312091486.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/c8835db47fad8a510393ab7026d73173/92439942543.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/89727790931.pdfIn PDF document text
    • https://hostingalani.com/calisma2/files/uploads/71921328496.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/xenamit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+use+oster+toaster+oven+air+fryerPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10328 17048 bytes
SHA-256: c876836cb9fa18909381f921b8897f1331f0e21dfeca93864375feb4a60e6c3d
font_02_sfnt_off00012f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F47 10520 bytes
SHA-256: be8b7cac004a5dca21b211bd0e7eae67ff96d434c7fb5a03f5cf260bc2832202

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