Malicious PDF — malware analysis report

Static analysis result for SHA-256 6016dc598e098c2f…

MALICIOUS

PDF

228.3 KB Created: 2021-06-29 05:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b8d23d3196179e70da6108e007f3f20c SHA-1: 6c3a359ccb29cb4da6905912a7a77a20ffc8a334 SHA-256: 6016dc598e098c2fe1f89fb54a89760c018db9d678925973ec96b3b821757eae
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating it is a phishing lure, specifically using an SEO redirector to impersonate a game download. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing campaign designed to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=tekken+tag+tournament+2+game+free+download+for+pc PDF link annotation
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/an4pmadfscmrv0orv3dmg9rsd7/ligibikafesatesojovod.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/56089911716.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/poxubisuka.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ce478330b---gagiponodudima.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/masorilesafabojipobux.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/vubojesekilenijux.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/22803697899.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/95295023761.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a9cf6c6a17e86d6f316ed9206881cfb9/20042708414.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9324b4543---66523687517.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c739beb50b1537d41ae819956cd14489/10641447203.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/gugipavalapar.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac07577072---javiladizuxavuzimaj.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/4c926997b31c770fe15e0218fba5afe5/34040855929.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/27047597081.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae8828b7f1---25753099861.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/0859568cdb98ec0510cfe36b066212dc/56718975763.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/85412578131.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E665 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE73 17156 bytes
SHA-256: a6d633bd87cb7c58c9314589f797143390827cd1aaf400d799f2783b1e0876a3
font_02_sfnt_off0003335e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3335E 11064 bytes
SHA-256: e84eec074b5c7b10181d19bbb22a048c0027827f35d7e0c055dfd368c18dca1d
font_03_sfnt_off00034d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D17 19988 bytes
SHA-256: cf84aad5d02bcd93c3180a2ccf2e9933ac13b7eafa1e4147f00a167af3418523

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