Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8f51f822bcb119…

MALICIOUS

PDF

102.7 KB Created: 2021-10-16 22:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: e309e514dc569e5b6d426d5f426b4268 SHA-1: e842bd67d1d366d1ea0ef88ee7c0de0dcce360fa SHA-256: aa8f51f822bcb1197886db0e7bf4d011cce6429d20ffcf6be20e2c54ac08f742
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://laborke.ru/uplcv?utm_term=handsome+meaning+in+english PDF link annotation
    • http://inbjnews.com/data/cheditor/0603/files/98283273562.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/xufik.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/mediga.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/lemivoriri.pdfIn PDF document text
    • http://strahyi.ru/images/file/namoluru.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/modonalab.pdfIn PDF document text
    • http://fohow77.ru/upload/file/tupefunafewilarixebopaf.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210909_074751.pdfIn PDF document text
    • http://mocphatreal.com/assets/images/ckfinder/files/zobepewerugitosef.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/nunebubivizoxawulajosedi.pdfIn PDF document text
    • https://soenen-pneus.com/upload/file/kanen.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/20358352164.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/3280681bc60903ed401c314e4bb63b8c/fojugopenog.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614528064d72b---61763292704.pdfIn PDF document text
    • https://testagenda1.myagenda.cz/pictures/editor/files/weregaxegajojisiva.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/19881792808.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/zisozujajidijurilujevi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/1576f953e2178045d369beec91e9c584/kanesibitonopibiwob.pdfIn PDF document text
    • http://www.agot.pl/upload/file/towopagiribexeduxu.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/161660380e561c---30693021649.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/jekadux.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/87550109510.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/a256a5eb373rsmdpfppck3qci9/tesotemuvelejezonov.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 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_off0001301e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301E 10488 bytes
SHA-256: 7a53af0c7a3ed6397c87b6850dac50cef71170d2a72430ac94ab827a16176349
font_01_sfnt_off00014768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14768 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F7A 17492 bytes
SHA-256: 3af424766d603305ad777c41081541702ccdae25200c95c61b7d668c945dffb0