Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24c4b758aadd3c7…

MALICIOUS

PDF

84.1 KB Created: 2021-09-17 23:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 246f0a3cc399b6be790b6c0e06ebc663 SHA-1: 70b67b0e1f316b6f593933925c9b7b235526e41d SHA-256: f24c4b758aadd3c7d9285e30053491276f99b0e10307e279ec5eaf5c11831a26
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be acting as a link farm to redirect users to malicious content hosted on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/a2u5mghggutnkaf7k1ept0tejb/lavezujezotunaparosuwa.pdf In PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dapakifokativuxop.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/mugazuxizeriz.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb0cec4d24---nokexokezomoletujexiji.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb1d287cd3---julimirisurojazuvi.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/46437892486.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/84205441939.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/58862387323.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/51681350219.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161448420b1cdc---65756425084.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109102212214305.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/16952471212.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/58154966794.pdfIn PDF document text
    • http://chernogolovka.inhome360.ru/admin/ckfinder/userfiles/files/45525200393.pdfIn PDF document text
    • http://abnicum.ru/files/file/sarekaxipuvutexutisa.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210918031036.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/99096523699.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/3993380603.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/gefilidudarir.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b04887615---gitomasakep.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/pelidegojejilofe.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/samaxodabita.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/tadonivenusegavoneseba.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614098fe1258c---duzuxakabirijiwul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=kris+jenner+playboy+shootPDF 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_off0000e191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE191 18692 bytes
SHA-256: fedc89258a890e2f4ab8f9fb31f42505f7286f99857c49a7391767424d83ca89
font_01_sfnt_off00011264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11264 10724 bytes
SHA-256: df3db498ff05e333809bf944bf85b8c3d02035c41b9b108a9314e081026997ae
font_02_sfnt_off00012ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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