Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ce81539054ca7b…

MALICIOUS

PDF

88.3 KB Created: 2022-04-19 20:38:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-26
MD5: 36c60053332383a192ac7b1a62b8aecf SHA-1: 900738ae00a4160a41a6a3a142a3ef04318b80de SHA-256: a9ce81539054ca7b453eced59a3ee3c4f4e33f970d10d3dcd574369acced4b72
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • 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=what%20is%20the%20role%20of%20educational%20psychology PDF link annotation
    • http://elmbys.se/kcfinder/upload/files/todarelikozutifopugusi.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/nexazasepovipavikebamifib.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/kemigotoruguwijef.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1625ddfa33e084---11837278754.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621932d9d871f---kujuti.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/suxutafumuvamuporuvidi.pdfIn PDF document text
    • https://dezipozapuxel.weebly.com/uploads/1/3/4/5/134595234/jogupobevas_nujometovabas_resegas_gusiwobijinawas.pdfIn PDF document text
    • https://dolaodong.baohohoanglong.com/userfiles/file/zexixizaxojiruxajerupit.pdfIn PDF document text
    • https://jifujutikawe.weebly.com/uploads/1/3/5/3/135328504/1463148.pdfIn PDF document text
    • http://njchemland.com/upload/files/jizuvepo.pdfIn PDF document text
    • http://cmsrecuperocrediti.it/images/file/mutakojavulerofewaxa.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/76703641219.pdfIn PDF document text
    • https://pmrmhss.com/userfiles/file/vetokafuwazugosogiparoxi.pdfIn PDF document text
    • https://sarotokatot.weebly.com/uploads/1/3/2/6/132682281/jasule_samexosipixe_wabokonulev.pdfIn PDF document text
    • http://cl-pub.com/files/files/vuwebefukenesemomekogonor.pdfIn PDF document text
    • https://bufigolumixi.weebly.com/uploads/1/3/4/2/134234787/xejizisoz_binexejibuwudav_xegavagad.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161fa7223c35dd---20326018308.pdfIn PDF document text
    • http://legrand-valena.su/kcfinder/upload/files/82553372909.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20220307072949.pdfIn PDF document text
    • http://gumho.puruemi.com/userData/affis_board/file/vexemitigugofozujenok.pdfIn PDF document text
    • http://blue-balloon.pl/files/files/regalizikobegemovikamukum.pdfIn PDF document text
    • https://goldmenu.com/userfiles/file/85826196025.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_off0000f52b.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000f52b.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52B 11108 bytes
SHA-256: 923d347e2e48d960880343e78e3b41ae84855030c2556a49760a03479c2dc6e5
font_01_sfnt_off00010ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED7 17168 bytes
SHA-256: d78b5e0fb1b5ddb42c25ce992d9a8ed5f77521c7af2f401d3b24355405faa67a
font_02_sfnt_off00013b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1