Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e3e465929fdbac4…

MALICIOUS

PDF

81.2 KB Created: 2021-09-05 08:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ddfd6ac92946fd60372795d62dfe0edd SHA-1: 7c291fc10ffef7927a8d294d8d17a65dc8228212 SHA-256: 7e3e465929fdbac48ddc3ff815f01fc2fd030d6671b5300d7791adb49f4b05bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malware distribution lure. It contains a large number of external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://nomylo.ru/uplcv?utm_term=azure+service+bus+tutorial+pdf PDF link annotation
    • https://unibel.pl/pliki/upload/file/98864488589.pdfIn PDF document text
    • http://salt17.com/userfiles/files/96720912479.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/9c17feb4d243de5520ea7e3db642ffe2/zoxujizusogudatogubaxaj.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/tixakokufajoju.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/joful.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85e61ee21a---kesenolonixajikerusun.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/diwaxuzuwesugubu.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dorekusupebif.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/47022798999.pdfIn PDF document text
    • http://areaarchitetti.com/userfiles/files/45647978764.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/guwotitelidobivugozapapu.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/viratulewofudinajokorewib.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/18084180312.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/f37d9439b71316d88a7b7df44a77a2f6/furaraf.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/pivelo.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161098fd852821---57559532014.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/305rkrrb6rqs62o6u2ojfv8tt3/xajibexuzugafawogafito.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/6634600280.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/majobaxuzobatepudukila.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/zonavesap.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/80444266856.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/digaxogi.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756daf29d09---96042028138.pdfIn PDF document text
    • 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_off0000d5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E3 10856 bytes
SHA-256: 8080fdc2622e4bbc8079094a67e7a56308ce6de3ac6033011d33ec27c65d5bb0
font_01_sfnt_off0000ef03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF03 18384 bytes
SHA-256: 5f37626f5a5372f016c742754be536df21fce1a094ef001c4aa116853dd7640b
font_02_sfnt_off00011f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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