Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8620152ad1910b…

MALICIOUS

PDF

80.0 KB Created: 2021-09-10 19:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-07
MD5: 98d25afe5262b77ba5d925d483c6dc42 SHA-1: 8935a7a9d5c56f8357c05ffb729d423d4cd57a99 SHA-256: aa8620152ad1910b41e6001a3fc8096aeb0a95c38e1cbf79da26067967fa7656
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=hack+unifi+password PDF link annotation
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131beedea452---dazabel.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/kunofefivurenirogej.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/2763807353645205c6e70939170d4f63/rurofulure.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/filana.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e991f702c6---lafewor.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/sarimezej.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/nolup.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/42636369087.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/14943997680.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/kijoxusul.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/41939047612.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/debesosolegukirerozo.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/womekiritejaxujowaza.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/47682449081.pdfIn PDF document text
    • https://rafautama.com/uploads/file/pepekiz.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/63560070141.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/pemalokotemupidijokema.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/fixizovotiroguge.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/kenozuwi.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/mebejakowubesatagerepakup.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/11384445420.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_off0000d0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D7 10608 bytes
SHA-256: 4ce5d0275413bcd594ac20458d31df7d766165bb147f62faf9e2accbbde94742
font_02_sfnt_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 18948 bytes
SHA-256: cbcab97cfb0a13307b6a6914f1af4e623fc5ad8f18ab9a815e9110e027ccc24c

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