Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99ebcb85326f407…

MALICIOUS

PDF

100.5 KB Created: 2021-09-14 10:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 334a42b31465b8cfdb21ea478ebc6ccd SHA-1: 744502d7900733f2f6d616e6eb341e02c61fb874 SHA-256: f99ebcb85326f4075aefeaab82770cf532d624bf7edd9f3b217f5c20d182d1e9
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16136ccc6c7fae---92112092381.pdf In PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/velojurimujujenir.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/jonekotijulagoxalof.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/ripatuwubupilusamulek.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/dilej.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/pepibitax.pdfIn PDF document text
    • http://www.farnostbobrova.cz/ckfinder/files/79048605812.pdfIn PDF document text
    • http://secoinblock.com/upload/files/vigigofojem.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/dinumu.pdfIn PDF document text
    • https://svltv.in/userfiles/files/birupuje.pdfIn PDF document text
    • https://quizai.com/uploads/files/43511209447.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/8991771936.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/62812888132.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/10043190402.pdfIn PDF document text
    • http://ping-property.com/user_img/files/22243676092.pdfIn PDF document text
    • https://theipbuzz.com/images/file/fugibukijamasilib.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c74b26511---mupiwedinemuzafave.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/18768755671.pdfIn PDF document text
    • http://strelnicebudejovice.cz/userfiles/file/vivegizugekugilubominewa.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/31350464802.pdfIn PDF document text
    • http://parilka.by/var/upload/file/58305861322.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/457594524.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/13605525728.pdfIn PDF document text
    • http://inphuduong.vn/upload/files/26010858679.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=gy%C3%A1ri+programok+t%C3%B6rl%C3%A9se+androidPDF 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_off0001205d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205D 11528 bytes
SHA-256: 3d7b02b0858fee67d31a6c7c53a7b2fd7cdd09106edd530f30e32eb4bfb494b4
font_01_sfnt_off00013a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15282 19236 bytes
SHA-256: d78904cce283ded84914a17733a961947a84063bad495ee0d3299f2c3966043a

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