Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7cf2031c9de7b4…

MALICIOUS

PDF

90.9 KB Created: 2021-09-07 08:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cfe0f60df1623a2fb6898959c999090b SHA-1: a050a2edfb794bb6e642d123319b1fa6ad7d48b2 SHA-256: 3f7cf2031c9de7b4a83efc1746a7cc4c28ec85b4c20c73fdc56fec5abb0160c7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The presence of a link farm on disposable hosting further supports a malicious intent, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb7a9f326---petoxesitamezu.pdf In PDF document text
    • http://partner-support.net/user_data/userfiles/files/5097722115.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/24219459902.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/50659066035.pdfIn PDF document text
    • http://euro-ex.com/images/blog/file/pamifasexun.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d4181cda3c4---jekisuziwitisoj.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/77758531581.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/radetekemuxufo.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18a4e9a10c---redinajaterefop.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/kajegenojus.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/9ddd6231d84407974558c19acb531f89/48296481310.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a3ad79e5c---femedagumudubisulosikoxan.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/19507268225.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/61104115555e121aa92cd04a7d0d0157/42541885756.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/0583a4fd039af25b4cccc6261374a056/20472409837.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/tositasegilezaxe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c42140baa42---78305454796.pdfIn PDF document text
    • http://foxhill101.com/userimages/padoporumemipoli.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/gejudas.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/81996554256.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/49688610398.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/92920182806.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/6873725142.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/46044198485.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/34684130689.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607041107cb19---galevagakamumejutisudo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=padre+rico+padre+pobre+pdf+completo+espa%C3%B1ol+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_off0000f845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF845 19516 bytes
SHA-256: 63d6ffbb9058dba204f1b60bc27bd013fe36ca3f4704f3f4fee10ed2de1c41c7
font_01_sfnt_off000129fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14213 11024 bytes
SHA-256: 51a78216ea4390328d60ed416b6148a6bad4d6e8369847defcda0ec7c437c83a

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