Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc6e187138a3706…

MALICIOUS

PDF

89.1 KB Created: 2021-06-25 17:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c879aeb2e73d3d9eee899f246e5c9257 SHA-1: 127edb0d5541320d0b8cb2cc30be66af2d934011 SHA-256: 2cc6e187138a370603c98879b2085828bc910f1a8b1486621e4d6025e872af1d
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or SEO poisoning tactic. The embedded URLs likely serve to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://unique.global/wp-content/plugins/super-forms/uploads/php/files/998976993aef0a5c21d50569da08890f/5069186232.pdf In PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a05b7b4884---mimekeduxux.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/16200836116.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b7c0b7329---meliboredaxowinuge.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/tudovemamoboma.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/zefusagiroxepomerunobi.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/javafafipegalawasabu.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1620893854.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2f005cbc3---vuvokazejusudaruvitajem.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/2039791dea1ec55138e02f281d23f42a/pumonavowomelewutifo.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/978f6ec3c6e46c7c904e7e0c4c32b282/61966638460.pdfIn PDF document text
    • https://datajournonepal.org/files/japazananawadegature.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/47262731680.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7696682e85---42599486475.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721129b875c---13510584897.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7a9eaceba---fosis.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/kojulogakolel.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d0707bb17---72341316950.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b728d05f9be---jarajodixamizatovodikir.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/waramudovasiresusef.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/nusomimef.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160739f1fb24c6---76829502695.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/32679779063.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6363b493e9---xidoboreguwulowaxelob.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/cpe0sl0gj7k9jg48v1pc9t7tv1/95644853908.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/zegigepexutinoranev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=linear+equations+form+1PDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/4a53e28e213a4dff7256b5dccb9b11fe/20436157576.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_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7E 18320 bytes
SHA-256: d15ce984945b5f5a85caab4a5718bdbb3a5d0fe0f0e20fe535ab37dae28de7a8
font_02_sfnt_off00013f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F03 10584 bytes
SHA-256: a9226b2fc5da0ded8b061fb4f297780910d343e8993a836393bc287fb6fe3bc6