Malicious PDF — malware analysis report

Static analysis result for SHA-256 3edf000ff2a11470…

MALICIOUS

PDF

96.2 KB Created: 2021-09-06 11:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8b5ea8ae0e420ed62e60fb29b90a4d9b SHA-1: 56ba37f5b734e4d87bbd0876184fab6ce82c4a7c SHA-256: 3edf000ff2a114706337a4bfc1c6bc3b61c6ffe803cb4834261664ddc555f9b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable hosting, likely to distribute further malware or phishing content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically highlights its nature as a link farm on potentially untrustworthy domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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 http://vinhthuan.com/upload/files/girusedigilege.pdf In PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/i1fnvptgimpt555stl09j6b4dj/49950543390.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/bipuxa.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/74640375792.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/e1ca8cd8e4d4509ba74bb47976882f0f/22678105559.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4ba7bbe0e---jakipabilodikotulovipejod.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/lapagebe.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607368b48e212---13234219456.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094a207d9180---6602012546.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/49e58dc16729382f436a01ae262e0e04/legoronewasovatukuz.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/45701254780.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aac9d20ff7---kududesipojerajo.pdfIn PDF document text
    • https://chptravel.ir/data/file/28371731779.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/bubodiwulak.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/jedadoludul.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/zupexugo.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/a11d88459f49d97b8c8497bed4999daa/basabegenabutuben.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/50938437352.pdfIn PDF document text
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/ed0tsr59l9g6c6g5r09gdftvgs/pewadusonopubalijivisuvij.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49f2212e04---25921103659.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/86755601064.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/nareviteviwatixalusujat.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/kikudedufozopajopup.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/sepegivuvubepoxofoxo.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/b98fcf9ca81db39668ef5988afb39341/tawujurudonilovedodotixi.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/86055850334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=sharm+el+sheikh+map+pdfPDF 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_off000112b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC5 18236 bytes
SHA-256: 61e56f6d10cb53d1e40a5fcc585dc2cdfc4dbc8189137400a45d8e9514ab4840
font_02_sfnt_off00015abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ABD 10608 bytes
SHA-256: 317dd5261648cd31375de230cf0ebd0044e9bcab16c18d6d50eff518e8d7ebf0

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