Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cfd29206a7eb4a0…

MALICIOUS

PDF

86.0 KB Created: 2021-08-02 22:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c9be5c053aa84381b4b2903d781dac3c SHA-1: 9b7036c7f5523da1c38ac6b63bfce9f5b30d8531 SHA-256: 6cfd29206a7eb4a0e6c1c04044169a1bda2651635aa073418bc1f87251e034af
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links, many pointing to compromised CMS upload directories, suggesting it is designed to redirect users to malicious content or phishing sites. The presence of link farm techniques and disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/bda677763d04424f3120bc6aac3dfc1d/bebumogivutoki.pdf In PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/samidogifozesoroxog.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/3b6adab84fc1c301f170205d0ee423f9/kelaboruvide.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/kerirozapetadebapibegitib.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/03hs9mhmi7hiher09pc99crsnj/jorivizuga.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/1bc2f978eb1fd48cc331ff3c30a5fccf/jenugu.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f02be9680---fininul.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c958684bf7b---luveguxu.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/72272237288.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/kopajowasilujimeli.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/36351763492.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/qej1std91fr87qbtklbfmn4tkq/25575080116.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/78431003513.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e70bb662c7---59803263295.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/4496606474.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/liwiwoxokopufaxud.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/63250219282.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/damemumubosuvekijopas.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/82168276835.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807e63a7645---ladezeni.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/48560677525.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a47b458512a---72262562779.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/st30stq3b7nhdo2ug0pvfjjotq/nulanebikevozolimarurovok.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/95593915911.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/65573558894.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/jutimedivazovokeseviger.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160988e064883c---26619985324.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=mass+transfer+text+book+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_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 17308 bytes
SHA-256: 66aaf75432d55a5b838f1dc0c23ec1c16e171777a6bfd8f9b693b7ddc08fabbd
font_01_sfnt_off00011993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11993 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AA 10680 bytes
SHA-256: 88ca1e79f343257827caebada1fc7a2653e704ab0b2eb44500cca3178f9eb989

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