Malicious PDF — malware analysis report

Static analysis result for SHA-256 86beff68bf36e7ec…

MALICIOUS

PDF

74.4 KB Created: 2021-09-03 06:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fd7d2210e0afaa11cf1173511e86270f SHA-1: 3c770afabcb41093901955c57c4d80bc068873af SHA-256: 86beff68bf36e7ec5af3a750953ce236f75b7f849f11dcca1344d8a8ce777375
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary function appears to be directing users to external sites, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=karnataka+voter+list+with+photo+2018+pdf+download PDF link annotation
    • https://bdaudit.ro/userfiles/file/zupirezat.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/61764081987.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/tobovijesadupunebuve.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/73508387303.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/7a3f0175257270df7e13fe8fc1846d28/telubu.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/90387425064.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/63215291669.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210616_023405.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/r3dbjl02c13rjmk7okr926stmh/76184141019.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/zerorilore.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/kutojibagabigij.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8261448a6---sunixozeroz.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e690ac6c5ed---7358063734.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/miwavusipinabuwogojij.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/76100535960.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/71761968320.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/5c719e341c704ed8c9f5957ac5d1440c/72886819674.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091fa76319b6---96295227566.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/39c59764ff8fad6d7edce69a91decae2/jupatojaroguligijamefu.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/00335a159d5ec6550847291fd2943dbf/tepulagi.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/3b941d578c787aa4d29f75547d09f1ac/45053645654.pdfIn PDF document text
    • https://begili.com/uploads/image/files/52147761042.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759c880a032---vezogililuxosama.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D9 11332 bytes
SHA-256: 223d03d14e0f4a919dff58451f9265774bcec843d39e4ee24feb39f80473f82e
font_01_sfnt_off0000cb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB89 1888 bytes
SHA-256: 228445a3744f13af4bf84041e55802a923554d86926eb0745489ea117e4ab105
font_02_sfnt_off0000d452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD452 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 17944 bytes
SHA-256: d9769a5066f40de8047f9ab9b54c0314edfb11986bc2dd3f6b1385b3311ee5c2

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