Malicious PDF — malware analysis report

Static analysis result for SHA-256 87537d5b8b5fb740…

MALICIOUS

PDF

79.1 KB Created: 2022-04-12 18:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-05
MD5: 63d7e63b49ec11c25d78360e48008c09 SHA-1: 7e1f1cc20662e6c511427e17966f0a9194701005 SHA-256: 87537d5b8b5fb740cdc4d5541948895682a280e3e15b3d6a7c09121beb8b09ee
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://wirut.co.za/YmrXLWy8?keyword=are%20marriage%20counselors%20covered%20by%20insurance PDF link annotation
    • http://noavarservice.com/ckfinder/userfiles/files/23405952582.pdfIn PDF document text
    • http://festivaltasteof.com/files/files/vibasefinixivaropuxonor.pdfIn PDF document text
    • https://baboromet.weebly.com/uploads/1/3/1/6/131606353/4065251.pdfIn PDF document text
    • https://didegesutozixu.weebly.com/uploads/1/3/2/6/132695701/sufonukez-dobumadepuj.pdfIn PDF document text
    • https://czus-lukasa.sk/userfiles/file/27188950950.pdfIn PDF document text
    • https://popekuzukije.weebly.com/uploads/1/3/4/4/134471955/kidabodepezurugida.pdfIn PDF document text
    • https://bakovumosu.weebly.com/uploads/1/3/4/6/134679162/kopepofim_gipixara_mezimidibexu_migisamed.pdfIn PDF document text
    • https://zegibofes.weebly.com/uploads/1/3/4/4/134495781/4873930.pdfIn PDF document text
    • https://kesowetowewi.weebly.com/uploads/1/3/4/5/134598476/lopibemufuv.pdfIn PDF document text
    • http://www.louervendreaumaroc.com/kcfinder/upload/files/pibojukavawetole.pdfIn PDF document text
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/8937664.pdfIn PDF document text
    • https://ltes.tw-goods.com/UserFiles/files/83850487001.pdfIn PDF document text
    • https://zobujopexa.weebly.com/uploads/1/3/0/9/130969678/sifofa.pdfIn PDF document text
    • https://tejukazirinari.weebly.com/uploads/1/3/1/3/131398521/4b94d9dd1a4654.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/75818058530.pdfIn PDF document text
    • https://mokoxofedig.weebly.com/uploads/1/3/4/8/134891763/44e1b.pdfIn PDF document text
    • https://bulewafaki.weebly.com/uploads/1/3/4/6/134682315/3669173.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/40045103942.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/27734318245.pdfIn PDF document text
    • https://sererewaxux.weebly.com/uploads/1/3/4/9/134903335/1385812.pdfIn PDF document text
    • https://sutivekawexebe.weebly.com/uploads/1/3/1/6/131636655/luwuz_mikovazibi_gawoxen_loradega.pdfIn PDF document text
    • http://varvshistoriska.com/file/diwadusedasunogum.pdfIn PDF document text
    • http://apexemergencias.com/images/files/jadesowelamigupivoreg.pdfIn PDF document text
    • https://kitomejefu.weebly.com/uploads/1/3/4/1/134108571/sonuke.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16212005438894---liperuputawavobuduj.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/84416ca8d30ef859598bbc1a5f8be8f1/29498200785.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 extracted file (font_00_sfnt_off0000d1b1.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000d1b1.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B1 16524 bytes
SHA-256: 85e0d3079040b9ad7e1eac7dcd597109d432c89976a4654d4f1941b80f5c7673
font_01_sfnt_off0000fc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 11016 bytes
SHA-256: d7900743105bfbfc63a9628a95a5de30e79848c2a2633a6472d9e6eed5ac1afc
font_02_sfnt_off000115e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1