Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccca2270d51f4c6…

MALICIOUS

PDF

93.6 KB Created: 2021-07-07 07:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 51903de392478f12d5fb9c45c570ef1e SHA-1: ad60759a876daa9a0b57144dc37b47125a6997c5 SHA-256: 2ccca2270d51f4c6b00871c7848dfdcdc3f950a3e029a1b210b29492560b5b99
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, suggesting a link farm or redirection mechanism. The presence of these links indicates an attempt to direct users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://infrive.ru/uplcv?utm_term=introduction+to+business+organisation+ppt
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/79fe6275b30caa6fd612296bcae0798e/49399418837.pdf
    • http://sl-light.ru/design/img/upload/file/79984317353.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/3do5ouqv78c2f0acjs8slm0ka5/kesixevexuwenerufupufu.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a41d67e876---33335150280.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072339fa39f6---dirilofel.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/hr8rvf7bvdvdvl2ou11gbs85d6/75823177540.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081552db4a4c---kovafaxina.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/2de3250d4112fb0694f430c06fb299a7/56488801640.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/2abab0bd455d927edf45b3ca8162dff4/xanopizagu.pdf
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210611211107.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/9ivouo0kqi2baiffi432tnm3bg/fudewinopaleg.pdf
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607faac0cf359---ruzutixitim.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d04e8cab89---17183051594.pdf
    • https://dcoderesearch.com/uploads/kepexibijebagimoka.pdf
    • https://hosvagyok.hu/userfiles/file/83985598852.pdf
    • http://baheth24aqari.com/ckfinder/userfiles/files/juzijolefez.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/qtnkgm1ri550jpva4dhh77qpp5/39176750900.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d97a1672fb2c8526e3db9c5da7416e5f/velujosepoziwawojip.pdf
    • http://cs-web-design.de/ablage/userfiles/files/46285077409.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/ec559eb5780a2cbac64476f26142f9cd/xafabanukalitewupoxuf.pdf
    • http://4grd.com/cmsimages/file/56380070424.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/f52dc60f3a1b583d0229e62606400645/gitatakizuvugokenerogaluw.pdf
    • http://zuche0551.com/upload/file/80137289797.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_off000108f2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108F2 16792 bytes
font_01_sfnt_off00012109.bin
8ee2f6e1a7dd1852ed081e0e8492f34c3650b561b6faa09100b2350aed4244e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12109 10832 bytes
font_02_sfnt_off000139bd.bin
c364fa89b81c105243286c5ee1ad38784ddecdaf8add85243755ece4a37e014e
pdf-font-stream PDF embedded font (sfnt) at offset 0x139BD 18004 bytes