Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0994337b171511…

MALICIOUS

PDF

90.5 KB Created: 2021-08-10 02:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 75da9907e524054695ceac3d6c4f24da SHA-1: 74b100be1b28c5cfdb6bf2ba680ff1d2b2bbcfea SHA-256: 2f0994337b171511d8a5dc73035ba2f959986d0562d4f5afcdb743d889cb8625
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The heuristics reveal it functions as a link farm, directing users to various compromised WordPress upload directories and disposable hosting sites, likely to download further malicious content. The presence of multiple external URIs and a link farm structure strongly suggests an attempt to distribute malware or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://exosportsante.fr/ckfinder/userfiles/files/7018497280.pdf In PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/5nght29dvgglqukduhq6pgr990/77031045710.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/gimifukozoxiwavisomarodiz.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/17262583021.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/tifin.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/fewededa.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078211e9217d---gopaxifebugu.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8173c0d99---nedabesun.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/fesazegavabeludipalazigo.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vevos3lrr6so0q7sqoi4hr9rs4/wujazinaden.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef46f659c6---88703403256.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/dobemoj.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/89833812003.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/0319682783f13649c86092ac74c23502/jibomewi.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca037728547---bavawariwuxipevixaduz.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9e04edb39b825ee710381086a1855c39/fevedugoremuxaluzomo.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/23642625404.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/61174609324.pdfIn PDF document text
    • https://capecoralliving.com/media/file/19547168197.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c58ee78c631---67855057102.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/83136405326.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/20474490583.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=what+is+a+good+introduction+for+a+video+interviewPDF 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_off0000fe3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11651 10952 bytes
SHA-256: 6390a9488e3d5ceab39c5a593f0a51e4d2a47b9825f1e474b50d0a50ee715964
font_02_sfnt_off00012f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8F 16888 bytes
SHA-256: da8b87b0c0dbb34e141b82a0cdb0b4e593cf822b0eef7a66404db76af964bc0e

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