Malicious PDF — malware analysis report

Static analysis result for SHA-256 800b46deff10bd2a…

MALICIOUS

PDF

80.7 KB Created: 2021-09-08 15:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dd2d1a45935be489fe4392d321d26c9c SHA-1: 1697bc393bf85725e402cf990380bfbbff3f408a SHA-256: 800b46deff10bd2a6384ee924e474ea7eacd43b1978ff2aa587bf1cddac6de3c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous links pointing to compromised websites, indicating it's designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is part of a link farm on disposable hosting, further supporting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/u62tj65l7j5cpf9agb1m3k1pih/98104927350.pdf In PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134a2b6d631a---84871597984.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/25497222237.pdfIn PDF document text
    • https://saptabangunmanunggal.com/indomobils/upload/file/medatusilarivapibuz.pdfIn PDF document text
    • https://crbz.ru/userfiles/file/30698531251.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/sukezemopafogawozukaxav.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb8d414ba0---39757237204.pdfIn PDF document text
    • https://areopag.ru/sites/default/files/uploads/lonok.pdfIn PDF document text
    • http://talleresjpg.es/img/file/95441630471.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/81719577680.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16138814ee2ad1---tezajowasojajamuwaki.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/gixowezuzo.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/88542178713.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/81884928101.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/16000809686.pdfIn PDF document text
    • http://thsport.dk/userfiles/file/zokovimivexazumi.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/79667429458.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/5dc151f71054b25b79b78d7fbe4780d2/97296226951.pdfIn PDF document text
    • https://neurondevelopment.org/userfiles/file/98220602178.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/ridoxufojiruxakisab.pdfIn PDF document text
    • http://2safe4u.cz/UserFiles/File/biravadakivesa.pdfIn PDF document text
    • http://goldenstarhotel.vn/images/uploads/files/zakoxal.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/7721086021.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/vogosalowexotiko.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/jivivukegojarumufali.pdfIn PDF document text
    • http://www.veslovani-vsb.cz/soubory/file/86024032492.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=craftsman+135+psi+air+compressor+10+gallon+manualPDF 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_off0000d51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2F 17460 bytes
SHA-256: 8ff2ada908398c003e3ea23bfe3c5be212487b63c1e0e8b6965b2dd22adfdcc6
font_02_sfnt_off00011987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11987 11436 bytes
SHA-256: 5dd11c30bd0035cfe3901c2c0fbf675d1f6e641556ecd94a02aeb14841572a40

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