Malicious PDF — malware analysis report

Static analysis result for SHA-256 4870f27611a4a810…

MALICIOUS

PDF

87.9 KB Created: 2021-10-10 21:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-22
MD5: d0a41fb8cd9ec02613fb212fc06cbbda SHA-1: 638f4ab72693710c64681fda4e871f630813f920 SHA-256: 4870f27611a4a8100bf28c18ce9ec86006cc2bdc9f63ae7e9e4077c970e32951
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://karolinanowak.com/userfiles/file/vunozisudidiridodir.pdf In PDF document text
    • https://normec-cm.com/ckfinder/userfiles/files/58649282593.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/26989038065.pdfIn PDF document text
    • http://minhanh.com/files/vivegeruja.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/26480a08108aa52b72d2adf2461ad026/baluzajudakibe.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/judeti.pdfIn PDF document text
    • http://ccadl.com/files/20211010060724.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/katajapubedolunozazok.pdfIn PDF document text
    • http://inica.org/files/file///87673383489.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/bijonosetagewobikibatitox.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/18893128235.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/93528566493.pdfIn PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/86228105542.pdfIn PDF document text
    • https://sanmuabandoanhnghiep.org/images/content/files/61225238078.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52273377514.pdfIn PDF document text
    • http://cnfglgreat.netsociality.com/upload/files/35368539640.pdfIn PDF document text
    • https://mlspoland.co/files/file/4047425840.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/51447427532.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/82983869502.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/461497582.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/laladobudegabusavaliwox.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/948daedf46b9af7cf753a90f2d5d203f/38206844395.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/63663584017.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/ritererojape.pdfIn PDF document text
    • https://huntic.ru/uplcv?utm_term=minecraft+things+to+make+in+survivalIn 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 extracted file (font_00_sfnt_off0000ee75.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000ee75.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001068c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068C 11036 bytes
SHA-256: dfb6d1c69c5e01d5fd91f063f4013a31846f60c96da9f18181a105406bf70454
font_02_sfnt_off00012015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12015 18772 bytes
SHA-256: a8e304ac39e6deff9d1f6f3e9caffe8c4c41086098775e19b91834ef43868e64