Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa742e6baa02dc01…

MALICIOUS

PDF

78.4 KB Created: 2021-06-09 08:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: fdb966e5f7d2e8b64bd75b69978218a5 SHA-1: 33c0b9498a3a9871c51ad292ae6e7833d8eaa854 SHA-256: aa742e6baa02dc01c36bf340b15b8763aafe1c5dce97dfbf510306d5c12df6b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to various websites, some of which are hosted on compromised CMS uploads. One URL, https://garglob.ru/uplcv?utm_term=mafia+city+mod+apk, suggests a lure for potentially unwanted software. No scripts were extracted from this sample, but the presence of multiple external links indicates an attempt to redirect the user to malicious or unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://garglob.ru/uplcv?utm_term=mafia+city+mod+apk PDF link annotation
    • https://broodjedenbosch.nl/ckfinder/userfiles/files/27592759871.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/5ba9df81c387c6c1a9d97f7c20672135/5449748083.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/c1a279003120fa6b1b7525c75ddf440f/kupakobalok.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/2361022218.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/wotutewi.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/fosiwuwurareliroxoxe.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/phen6st87sqodqae13sp609rn6/73453928517.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/69c974a261ec485d2372a5ba6f91c378/90251494132.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74b7342420---rolujewazixakilepelonaga.pdfIn PDF document text
    • https://nevisnews.com/userfiles/62669634743.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/88858261401.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/526a63e22c53e39a56e69a68903d4af1/munoxavajaxexufijikazu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c011a9588f---zegotodesodag.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/vajilotipara.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/418031bd9f4e4b034f10f3e608ab2b76/wonabisezij.pdfIn PDF document text
    • https://ckd-otto.com/contents//files/73910860359.pdfIn PDF document text
    • https://master-service.ro/images/file/tonokidobulofo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 5168 bytes
SHA-256: 5edca6dc1cd8731f2606de8b657c7ba65830cc77533a55cbf267fc833952e3c3
font_01_sfnt_off0000ffa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA0 18284 bytes
SHA-256: fabb6d5225ff3b281672dada500af834339c94adcb42260af58a9ed8198ccd61