Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35fc14dfb2273fe…

MALICIOUS

PDF

90.0 KB Created: 2021-08-22 00:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 17045c59e7805e80eb515ce5fcd4ec01 SHA-1: adfce3108da599db2a9fceb63b7e5b1a77886cfd SHA-256: e35fc14dfb2273febe157e8e63ca491270bc111f4a041f1f1c995114f6ffd2c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate the file's primary purpose is to direct users to malicious external content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://archism.ru/uplcv?utm_term=livre+apprentissage+italien+pdf+gratuit PDF link annotation
    • https://aawyx.com/sites/default/imageuser/file/sajurubavix.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/13306481244.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/7581809895.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/fenidewumonarij.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b017e7099dd---89321491048.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160781d8dc9319---kinupegazowuv.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/52528719092.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/3b09b2fdf9205ed8c7f341d2be3b8696/39315059997.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1d83c55a2---wunan.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0921be7acd---mafuzijete.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/14175523413.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/93476714458.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/ikb8kn6cqbmm909ie90s1chep4/33753628279.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/te1rrsubr0lsa4md4k9m41nlm3/lapenow.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/1236706091.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/jlr393dobvpi7f2ihgflf9acqq/xipalowo.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bced2937e72---walam.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/60042237937.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kqcdq02c6ag0m2d0t6ebmvg7s0/54086116488.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/161063f78c4a34---pikopukagimo.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/9a6c16bed295c9f9275405389d2eeb91/zilovoxuwejadufir.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021072008343073499.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/52130131913.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076a2b2238b6---jojikiwebiwogowedipikutip.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/a990a38c60e9037da648c9665bf1bdb0/muburumis.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_off0000f83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83E 18760 bytes
SHA-256: 32127fa30ab7ef759f83191626045ab7c454463e3abecc6d90eca22b94e18ae9
font_01_sfnt_off000126ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F06 10676 bytes
SHA-256: 77e6b007f440e9d4e43cda1c8159ebc1fedc9d833ff3e888d991a5aa26d21f9a

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