Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b468a782da28fd…

MALICIOUS

PDF

82.7 KB Created: 2021-09-07 13:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bd8baf219d79553f12ada079e3f2bd7b SHA-1: b26826cf700d2f212d7aa466208ad7aeb2cd15c1 SHA-256: 08b468a782da28fd4d21f36707a841ef5fae016cafa29d759f453380bda2db36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and link farms indicates an attempt to lead the user away from the document to a potentially harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://coretry.ru/uplcv?utm_term=alopecia+decalvante+pdf PDF link annotation
    • http://ergo-logo-bamberg.de/userfiles/file/dovevasejemo.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/8673c775d54f74541471e081666f1f6b/15996335187.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/9249267179.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa66f4de81f---98470711193.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/neboferiwalagewodiwak.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/tubipezelapexudejo.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8a143b239---lojarezitigir.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/rulekimunaripepid.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/fd31d26aa74300a37c0a4258bf78294a/25217732765.pdfIn PDF document text
    • https://soft-print.pl/app/webroot/media/files/bavikezotopuvabujoboja.pdfIn PDF document text
    • https://kopari.hu/files/file/dunegizusupupusetumuwanu.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160862dd9c2869---boxalikuf.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842aa75e6c4---tiberuniposebo.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/95140738739.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/pekobigevakip.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607aee892eafb---biloxarafe.pdfIn PDF document text
    • https://billard-hauri.ch/userfiles/file/70791979128.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f83f29c770---81840322654.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/80357640790.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/pejej.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///simup.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160e4e72d80360---265535344.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/rifaletadalilelexubav.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/dnrokshufr1n880eileabjpmcu/mawudaniwasukunedobitos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCC 19048 bytes
SHA-256: c5adfc1dc9c374ea441c12e6fd2b83853f155cf7d6a5c1865e6286c32945d001
font_01_sfnt_off00010dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D5 10392 bytes
SHA-256: 1facb665728eb07196b79c938018f51e8110dee3ea04e4492d653ea1179d7367