Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8e5419da322ee3…

MALICIOUS

PDF

91.1 KB Created: 2021-08-02 23:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 47225038382a97813badc76797a3524e SHA-1: 5c048986d2c4e0dbf72e72f79d20e5ad306de2dc SHA-256: 7c8e5419da322ee3a9ca58489eb8437387bc7e68255f6e1c88d5181f1b41583e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading 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://drafthe.ru/uplcv?utm_term=install+android+on+any+iphone+no+jailbreak PDF link annotation
    • http://bajajsports.com/userfiles/file/daxetefogazixesafe.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/d1eb95e63d76483f8225e508a86134a6/lulesojelafize.pdfIn PDF document text
    • http://deficanderel.org/clients/6/67/674a09facce11b7629d390eef9534ff9/File/72099759219.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/48142869933.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/kogapasaro.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca33cc4f3b---bozumodatifepolir.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2893e1cbe2---giwolabefoguzutosibinekom.pdfIn PDF document text
    • https://totspotdaynursery.co.uk/ckfinder/userfiles/files/zutakefalegasuvopujiteno.pdfIn PDF document text
    • https://lordoptika.hu/files/files/tesutepuviwinavido.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/e3uhbh8hrq0c5l1ehlhfef809u/javifamafanivuwogojamebex.pdfIn PDF document text
    • http://ping-property.com/user_img/files/24876433831.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5mgg7u2fshavsrbv26lct6d1p1/43676069190.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021051723091862.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d69a96fa5---85666778669.pdfIn PDF document text
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/4866768697.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/83029739667.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/91718962044.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/82085186355.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/vi4phhn7fj812qujpvhcrm2648/gajidoreju.pdfIn PDF document text
    • http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/nedemobarutuf.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/91908550614.pdfIn PDF document text
    • https://rcot.org/userfiles/file/54109488242.pdfIn PDF document text
    • https://sinarwaja.com/account/files/bikunanubusunonazuke.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/161006c79e4247---jowivozafojifutolisu.pdfIn PDF document text
    • http://altinay-law.com/images/file/nupovediguz.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_off0000fc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC21 18472 bytes
SHA-256: d7c882b610f8b1ffe7f858d1f6969bd212cade9df12669937630ecc5ac554353
font_01_sfnt_off00012ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD6 10916 bytes
SHA-256: 7a2c93096a32412b272888d30fa71635f7320edd70e95f4c73ecfb722a8a75cb
font_02_sfnt_off000143c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1