Malicious PDF — malware analysis report

Static analysis result for SHA-256 1724acd4d74e473a…

MALICIOUS

PDF

87.6 KB Created: 2021-08-03 04:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4cc63a92876d860738ae13d9bb19a0fb SHA-1: 86a9e7aab0131735db5d42c28fa712e37e35bfac SHA-256: 1724acd4d74e473a0ce8812bb7109236e7c0fca46532d87b8ff4daebed7baf24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://drafthe.ru/uplcv?utm_term=uva+wellassa+university+aptitude+exam PDF link annotation
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/31bbaa33c92f67f1e3a360c69f8ca1f2/vomadixebudoroxatofavivuf.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a4ba6f013---kopotatameforuw.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/zezaronurimokobojesidokez.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/d4hrv3bhe5i4p2ga19caqi4aoc/55374726678.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/3470409308.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/67806811903.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/02evm1h1826l2si80ehjf4f7l4/7069096215.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/49419031205.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/tebawobabaromewoku.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/tifilurag.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/15e01dcb1db4f85ca439fa8a53266904/borezuxudenasinetebeb.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/d1d5ushv0oj32hslp4rsj1msce/fawoxiwewofetadubirawel.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/53300c6dea1c186151a2f2cc4b22283d/pibexejesikipukuxu.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/235000f987b1ead2b472edc2be067f57/63923385147.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/pavajuvudobawisakamudad.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa473744ac9---tizedejejipakof.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ffa524d707e---26417773030.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/menupewuxavabof.pdfIn PDF document text
    • https://silga.ca/userfiles/file/dojev.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9a6e4468817466eb4a33740a370d619c/zamumigapepodamifale.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/20030529400.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/7fedad8a39ab6cb2ec9064a37e3c84ce/54993929213.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/lr52460v51lngj45voda7agi53/80202599795.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/lawomixes.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/2c0cbc9f6b99fd8b69abc3cdb7ab0b8c/tawolikurarisepowa.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6d577af32---nenuxuripaxatefatalaje.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_off0000ef78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 10908 bytes
SHA-256: 26e879efb8bcf14583b0206a767d02d178d884d7d50ac7e38ae843138c3481b8
font_01_sfnt_off000108c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DA 17360 bytes
SHA-256: 95b2ecd7c74b0395b428496c565392ffe19e991f452e5d1a4f7eb636f26ebc55

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