Malicious PDF — malware analysis report

Static analysis result for SHA-256 307dfbdeca8466d5…

MALICIOUS

PDF

89.7 KB Created: 2021-09-19 08:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d7f5c351b9a001c9739bf47fb37feb64 SHA-1: 052aa6b4b3f5bbbf443cb01473951c4f45ae4651 SHA-256: 307dfbdeca8466d5f898d9ee1ad2d5d5f67fe65477a605555da51f031578251f
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with exploitation techniques.

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://pistant.ru/uplcv?utm_term=movie+of+demon+slayer PDF link annotation
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/da884ba16b1f870f5ef58892d307a60e/82445676818.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/66278991226.pdfIn PDF document text
    • http://metallpress.info/files/71849201235.pdfIn PDF document text
    • http://kitpaisal.com/mypicture/file/bemoliwenavob.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/mitatetaxotututat.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/28480134589.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/kozudek.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/wevozigisif.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/18531004482.pdfIn PDF document text
    • https://gilbertems.com/videos/file/34949682330.pdfIn PDF document text
    • http://rooptex.com/uploads/libemoguzewipaliv.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/17261895839.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/89780092230.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/sugage.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/luxerilan.pdfIn PDF document text
    • http://ilkjv.com/Images/Media/files/69620705648.pdfIn PDF document text
    • https://stormester.no/files/file/71108176231.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/vapisini.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/mejelomonademibivavasa.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/89634042343.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/kanaxolinegixejigumav.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/divugokenoduvobore.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/12138306821.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/36f2fe5fcc26d75de07ea546e78d0b0f/mijaxuwudoritoxapotanire.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/55606176371.pdfIn PDF document text
    • https://petala.gr/userfiles/file/lagevogafotuxuzekibi.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/nukalejipuxepupikasube.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/60373248695.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_off0000ecb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB7 22976 bytes
SHA-256: c702bb53c92a29b1ac75d53616b82f0f6c3a7f6c6b489335519cd6d6eff104c5
font_01_sfnt_off00012909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12909 10592 bytes
SHA-256: 6ed7d7e76630b5f10aad7fc1b2ce3fadc84ed047a6c9efd6f0251647dad2fda7
font_02_sfnt_off00014138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14138 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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