Malicious PDF — malware analysis report

Static analysis result for SHA-256 2339c7e36b9daa6a…

MALICIOUS

PDF

96.2 KB Created: 2021-06-29 02:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8be1ae38ae1e629f8d230342670aac3 SHA-1: f6ee52a0a91746286de5a53b720d0e6f4b93fd76 SHA-256: 2339c7e36b9daa6abe6a8f59f9fc0c58695403739f1a5cacc2964fd63c28c6db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160790fe410dbb---sirajukewisenepapiju.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/e02a8b61c5d21ca80dbc2f6106fcd99a/12899650138.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606e59114aa64---33851640685.pdf
    • https://prawobrzeze.info/userfiles/file/xofidamugakemedeg.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609be4899cb47---ruludebojonibogenojefa.pdf
    • https://aimara-bg.com/userfiles/file/dabeterasixagazut.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bad7bacaf9---77766708867.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62ec232c4---safonebupepaw.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/fa227c1af46544c3f66b9fa7fd3d1a8f/vetapadaborewokazil.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/ei3sghofrup6a2pppj2rjqcarm/89066446921.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/7ac9f84e8872220d1dea57fa06b16c7b/sizetemazogezosojali.pdf
    • https://ssmavidiyar.com/public/content-images/files/pipesasinoli.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cc22cf98f---kemuninud.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2162eb9006---mipig.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/jiep3lf8inseooe4p2rmb6cij5/87516446053.pdf
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/kisijebivefane.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/ca27526eabd8aaab9c8b3158c49bce64/15825775658.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0b2b570da---63503587151.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/fe4097ac0af45b69b2b0e8033c1810ab/38859493717.pdf
    • https://benqmusicworkshop.com/fupload/file/pekibekisorabipenefu.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/75ebb31a0df3298e5599fc548278ad2a/46486112007.pdf
    • https://majorsagilekvaros.hu/uploads/file/48521011801.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8673ccfd1---64675314013.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf7e02032f---wagiwevokuvatekuluwosevaf.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=trapezius+muscle+origin+insertion+and+action
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113fb.bin
1e3bd880b73a9134fc9cc697dc0c8efbb33fba3b2593149dd0f3057db60d3fc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113FB 10980 bytes
font_01_sfnt_off00012d4a.bin
d2fe5c4edd31fe258b54dd609b298b326a2eaee5d0c79b183588a459119a09bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4A 17956 bytes
font_02_sfnt_off00015b37.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B37 16792 bytes

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