Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9ce23079011a13…

MALICIOUS

PDF

91.3 KB Created: 2021-08-11 06:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9e43178d5c49e37b3b92a11dbce3f00f SHA-1: 8745f552a6efa28501bc2ba9a147cdae952ee070 SHA-256: bd9ce23079011a139881fd1fa8640f56243651f56f646a5ccf9db476c41c9e0b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/6ccem271ua097g32t6pvr090sh/vavanezurusuloxido.pdf In PDF document text
    • https://mountmoriahcamp.com/media/98100607175.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/18572589637.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a587e665fe8---96818536195.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a34ec1ae336---nudovinosase.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/40529014393.pdfIn PDF document text
    • https://tavio.ru/files/file/sugavix.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/40821722433.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/wabanojok.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1611323fce4354---bekigibalaledaka.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/33179993293.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/fupozuroneralilanivo.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/31a4f57c5e53c636f5de9989a221b954/xorabiluwegaxukizuxi.pdfIn PDF document text
    • http://ropesadventure.com/d/files/69298028789.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/7tvapldju8u77b03bd51krifk5/tetevupawokekulotom.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/nolezoziwoliko.pdfIn PDF document text
    • http://industrialdevices.in/uploads/45869598346.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/padefozozepuvukofikog.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/93146903445.pdfIn PDF document text
    • http://arablift.net/userfiles/file/kuxet.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/lapasifopokixurelebi.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/86492917045.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/xaleloveribom.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b916472a17b---gamukokolekomadewonivifo.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/2c2561589091e08b9d7aa271132c0444/xatab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=are+5+letter+roblox+names+rarePDF 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_off00010020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10020 10532 bytes
SHA-256: 3d4a9ff7ac14830f3578264fd8677f682a585038543f981807a2ddd10100d9b5
font_01_sfnt_off00011839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11839 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001304b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1304B 17884 bytes
SHA-256: 02681fe61e8c47628bd46d29956775098fd1b061770ca2fd115d36a5dce9c392