Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c39b516934e2fe…

MALICIOUS

PDF

109.3 KB Created: 2021-08-26 13:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 49351e15014e595bce944191ad123562 SHA-1: 12c273dca730d23c83c7dcdb643461851dd71fb3 SHA-256: 60c39b516934e2fe34a2359f25e261481713cb1e61285108a0d50b822a3e31de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and disposable hosting, suggesting it's used for phishing or distributing further malware. No scripts were extracted, but the presence of many external links is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://medvor.ru/uplcv?utm_term=answer+ka+meaning PDF link annotation
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/be5ca35ba7a9129955b1d522782e95de/58649564599.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90849787770.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100d253841da---gegoloxonaf.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/dcd207d825d2a849fbbe2a3460050ba8/vobuzaduzubavefulekari.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/39364094635.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/11870305342.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/tikobazudewusegusumetedar.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108cc877eed2---wapopu.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/845b4ac4fceadf28e564ef31adb20023/56839652665.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/4571ae719da82fb1f5d2c79134418f1a/8011806997.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/d3b71db64881d40397031c731bec918d/navivoferu.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081c8a372d67---97424392375.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/b6a4e12e73d1bca3bc7d17650044d149/xotuginaxezobaxa.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e92c8158a46---taketema.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e5d410ae6---76543253766.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/ribokukezikezedozures.pdfIn PDF document text
    • http://glastergroup.ru/userfiles/file/xozalelitakida.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd1778eb91---49391946196.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/j2jh9v8il00vbotm5qgub8b914/92867610505.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/96c4bd2017b364e8a86fd6618bfa5b2e/89688792390.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/4734545890.pdfIn PDF document text
    • http://dentali.cz/files/files/27676508595.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/24813617955.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ffb74f1d526---40147630329.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/60580922498.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_off0000f790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 10344 bytes
SHA-256: dca5b8f631e90a94ff39cf1a2ad36c80aac61bb78b9ad18b65d236ee2f5c6952
font_01_sfnt_off00010ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF1 14148 bytes
SHA-256: e5ab61bfbdd26a1042e7f6a1a1aa467c01701e030db49a060ccea9d4151fd22d
font_02_sfnt_off00013c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001545b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1545B 30368 bytes
SHA-256: 45fdc2b3817fe82c9a190da484a6efb47574e5e55044b360988b8ba03176afce

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