Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f406a001555f40…

MALICIOUS

PDF

84.7 KB Created: 2021-09-02 20:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: ab1d742e5fb97016ceab4555db9648de SHA-1: 8906e2d8e247d8d8f9fb93387d81087e81abc81c SHA-256: a4f406a001555f40622c00194b8883fba60cbc21c9c9b9000329906c20179762
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/96686477a13ea1e519b4623c9fa74707/8927379336.pdf In PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec40ac4b2b2---65849263346.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607db1da93d07---5888501722.pdfIn PDF document text
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/58256605423.pdfIn PDF document text
    • https://jetaime-shop.com/files/vasikasujezirofu.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdb5211ecc---91833936141.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/vobezitabuf.pdfIn PDF document text
    • https://vieclamxaydung24h.com/upload/files/78383458517.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/90213589308.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c153471e18---91590047642.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/12f9555891388f0f9e776704e566e95b/rilufokeja.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/geqao7v16jdoc6pghkvvudbku7/mobipilofuf.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/zebikidazig.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/40938873718.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/14591223033.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/16537357321.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ad1b01a0---27508837693.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/96811841934.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/c46c9b7cf41fb61dfb15feb6ea923067/67868664952.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/29795044337.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/zexanilomaripawafuz.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/32ed3e5351f045da793503494cf0afb8/minalusof.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f2d73afd9---ganizumizatejipuku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=convert+docx+to+pdf+on+iphonePDF 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 extracted file (font_00_sfnt_off0000e063.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000e063.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE063 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87A 10540 bytes
SHA-256: 53f5dcce89e228867cc85e2a4d7983413ddd2efd6f661df4b8e3bdaa50a01e33
font_02_sfnt_off00011077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11077 19884 bytes
SHA-256: b77dc13ccc8f1d59c08bc6cd708285bd26d38bdba7d28a1fb4a20d65a85b67c6