Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94e4622371c5895…

MALICIOUS

PDF

83.4 KB Created: 2021-08-17 01:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 606a8f77d3cd99f58ee1e6dc9204fb39 SHA-1: c68c7b68be43a84d708376f90f48c3a4790b5db8 SHA-256: f94e4622371c5895dfb862c578e08f46e53c3baee6cb52a808bfa8c6062e6344
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 of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users through these links. No specific family could be identified.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115b365de740---josakemanakibokun.pdf In PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/b2ba7ddf0e1b2f9509e0d491b205314b/fojamimepiguligeru.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/3194045759.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/4cenln3gnne77vjkp6m9bqhbcm/34623883486.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b7cb0a5ce---vamuxixitovuta.pdfIn PDF document text
    • https://buka.ru/sadm_files/baretapiguku.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070801d061a5---pununofumarizakewomi.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796c3206494---dijagesenefejolipolavozi.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c950e6041ba---darifu.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/5406010838.pdfIn PDF document text
    • http://mvhs78.com/clients/68382/File/25242121516.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/dogagowaxozarizojojita.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/hlveomb8fng0qj9rn06f2atcet/35202862083.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/cirkilesei3sluvdra4opprkk7/zolakewaguwabagufuv.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/veroledilawu.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/2105170400419702993pco30.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/nr3akqajrr2jq47bc5h7bqasbk/17218089716.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/cijj7tk8slcfuagj4lhvtglqq1/92395714601.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/13723dd755f76665ad83facc04daf621/51280525714.pdfIn PDF document text
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/72522632737.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/50050608565.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/78929110949.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/nulujililegunomuvu.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160784fc274c3f---xedobak.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe55bc8d05---55562690169.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/dutimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=shiva+ashtottara+mp3+songs+free+downloadPDF 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_off0000e107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91E 11344 bytes
SHA-256: 7011afd581da1d4457ce88970a1ca2fb9b487124e42c08fba9ce1c6bd0bfab0f
font_02_sfnt_off00011383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11383 16720 bytes
SHA-256: 4eeb6961d0fc62393cf6de6c0369311efb8bdaf643a6af36130efa50f1bebac2

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