Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea336db5dbddec6…

MALICIOUS

PDF

75.9 KB Created: 2021-08-03 05:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 17a17461dfc255982e64ad7678837083 SHA-1: db578887d0b9ac416c504e1e389c8cf5d54e4a8b SHA-256: 2ea336db5dbddec6bac1b159d9ce9e051cc7670850fde023914bdf6bc0e7bc64
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many pointing to compromised or disposable hosting. These heuristics, combined with ClamAV detection and ML classification, strongly indicate a malicious phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • 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://mangonebike.com/uploads/file/nunevivizedijitigovotil.pdf In PDF document text
    • http://clubselectionvoyages.com/images/file/danux.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/70884239478.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/wisox.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/7nakhcderr2e9v24080328aull/nutipamubajukulupijeb.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/42694435582.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/akq25ni9graieqhutsfenc76tu/43412365368.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e676cb0d795---38411682825.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/40500512383.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/ladukonoxubunarifusulu.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/91667989977.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4dab76e0a---41645903772.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-7-26/20210726195400693453.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc06e42fb9---71789658578.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1c0d20a9f---biwin.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d4ea1b84dd2---39803050661.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/72223120727.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/mojuwi.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/11840010715.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/garidi.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a626b8e09d9---56890414572.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/1964769081.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/vamizefuzuwogitom.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/vikenuvisamuxiva.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/5f579c43580f692eef7b6b4f17d52fa9/zifetarir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=pepee+eski+b%C3%B6l%C3%BCmler+izlePDF 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_off0000c383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC383 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9A 10628 bytes
SHA-256: 4a954575425b449f808d7a979f52501a678af334bc84714e7799fa3875d7ceac
font_02_sfnt_off0000f364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF364 18004 bytes
SHA-256: ca0a74a8cf0b2e3455a89c3ab0675b513997a3a506cbe0d8c89b9a7204c288d0