Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8197c8a87a358e…

MALICIOUS

PDF

76.2 KB Created: 2021-11-11 05:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-07
MD5: ba8021d61c08eecd55f45880c7ea204b SHA-1: 455eb07752b15a81c7c3d5553378a6dd753e58b0 SHA-256: aa8197c8a87a358e159005c68e488b663bf43c40852aff1ebb749f0420183e45
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://fenixfalt.com/userfiles/file/xojave.pdf In PDF document text
    • https://sarna-zapiekanki.pl/ckfinder/userfiles/files/julosawekawetejegaxiken.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/wogimorowexazisokuxu.pdfIn PDF document text
    • http://plan.msu.ac.th/ckfinder/userfiles/files/65833872491.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/n5kf3m6fafd5s1g3ak5u8p6ka7/84119474811.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/fozotonapiranuvadako.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1617f998e0a33b---22445967236.pdfIn PDF document text
    • http://lamay.de/userfiles/file/82451469369.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/22887160597.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/fimizogotuxasa.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae93071b77---13069304556.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/73848876514.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/kanila.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/70506083782.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/ruminoteziziv.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/kurusoguno.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/rozomabasigupozumuge.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210915_902819EFEDDD5CEF.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/34564333860.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202111041015486319.pdfIn PDF document text
    • http://mousike.it/img_ins/files/6634496058.pdfIn PDF document text
    • http://zl369.net/userfiles/file/19582010000.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/vodipuxobonuxogidutapowuf.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/6374331514.pdfIn PDF document text
    • https://gskrem.ru/img/file/90649296112.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/RhDyTiV0TgQ/uplcv?utm_term=i+thought+it+wasPDF 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_off0000c7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B0 10144 bytes
SHA-256: acca7fd8b67f26471fc4893c92c289aa5f168d8c4bc4e817deb33f77900151f3
font_01_sfnt_off0000de9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9B 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_02_sfnt_off0000f5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BC 17648 bytes
SHA-256: e5282164e90681dac512b080b1d89bdbbcb53547b9019e92cce89e6205c6ff35