Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5c02df2450e666…

MALICIOUS

PDF

83.2 KB Created: 2021-09-06 23:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d4994af88f9b54ff68191be45c26fa4a SHA-1: e3fa70a80d5528200d9230e8ae4aad3f35909f90 SHA-256: 3b5c02df2450e666324939fec5b02ebd1c66df18ca9608d09136811510f4ed90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/vasebabenabaxodaj.pdf In PDF document text
    • http://digifast.cz/userfiles/kelopitovezasan.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/ruruman.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/mebep.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/12193585015.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607925a78e3da---83782646670.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4cd4c84b6---95298736857.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/c96d15dafdcb4562b5dfd10538c33aac/mifavuwojarafikemawefup.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/9998154141.pdfIn PDF document text
    • https://solucionesinmobiliariasavg.com/ckfinder/userfiles/files/morivuzedaxovodaxidew.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/582517562cf556e1e5a5ce8b8706ba1a/zuxijavofevi.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/4pq6vg42ndo1582301j64fp8gr/fevugeleg.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/kujakijuvazufugot.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/ropuximil.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/koxobikewiruvog.pdfIn PDF document text
    • http://agriturismofattorialucciano.it/ckfinder/userfiles/files/kefupisifesaro.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed47828f19---kiborebexe.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/t6pdii5crpdccplha1ui1c3u5l/gekixikun.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160836e81b2f01---54227129370.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/60444762893.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/lutekexodesasozuw.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f8b878ed9e8---43171848724.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/bbfb74401f9e9902503af0b9932b5657/ramutix.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/dumigiduletesux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=american+truck+simulator+manual+transmissionPDF link annotation
    • 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_off0000e082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE082 17856 bytes
SHA-256: 8b3d73a563ff5ff49c9b3db72d5bf5a8fa1d563deee44b97d7912a295159fa7e
font_01_sfnt_off00010ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE8 10564 bytes
SHA-256: a5bdb0b86d6212918de6fb204cae688dab94219ccac4c04f557e0b96ea7f5c4c
font_02_sfnt_off00012706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12706 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.