Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f429e82fb9aad1f…

MALICIOUS

PDF

84.3 KB Created: 2021-09-03 00:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4931dc19f5703f3d2880aae71a37a747 SHA-1: 2d067d1d8a6dbd088a3348924cd46cb60e647159 SHA-256: 5f429e82fb9aad1ff9b546e80bfed25d3dde587d862fa14d13e1fbfe68f077f3
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, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://ulrike-mayer.de/userfiles/files/33828931782.pdf In PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1189d4f584---76371340982.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/36157840116.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/20856473636.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/40514378298.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c739d5b995c---30578706126.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/29204002080.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/rufimebovumudutogetu.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/64470762630.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/kemajunifukalepatekesatob.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/diluxigozedofegugewobobat.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/a149716527ff8a5a2981928ec9d3ee01/tamononezijoxana.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a2604de6e0a4c3608f26da79f3f5337f/32944543744.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a94ab0ac9d8---konosofesiruja.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/matowiza.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3de9ed997e---76735958716.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/jeduzavu.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/68973848248.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/momogemuwilekojudabus.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a7b924ece---5557440440.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/e901e459cb49a81dfb5ba96fc4d952cb/78272169859.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/18c0620cf754b43f4247dfe9313f6203/17336125772.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/10808682436.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/6122202720.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/vatuwuj.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/34653449271.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/temodavazatuw.pdfIn PDF document text
    • http://polish-house.com/uploades/fckeditorfile/pudijaxijikojunewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=self+help+books+pdf+formatPDF 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_off0000e2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A8 10872 bytes
SHA-256: f2175a3c960f602b183080abcd88f9d8dbecb74f07c3d48a3475d7eaa58fb7b3
font_01_sfnt_off0000fb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 17940 bytes
SHA-256: 379da44b2ba01d9f8c482a064b9b4f0288e421d242d6d381995747b7943345d4
font_02_sfnt_off00012a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1