Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa83e02e00fa009b…

MALICIOUS

PDF

84.7 KB Created: 2021-09-11 15:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 678c4adfcef7acf84572548d3e8ab8d6 SHA-1: 77ceb54cf4d6f91863c1bbea9a2acfb4f7b97b17 SHA-256: aa83e02e00fa009b215a012d63cfe73e9e399a710b4ea58e5189acf50cddeae2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress upload directories or use disposable hosting, indicative of a link farm. The embedded JavaScript and link farm suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://alshamiltrading.com/alshamilfiles/file/47638608376.pdf In PDF document text
    • http://ailizia.com/userfiles/bakafefo.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/14021550365.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300935032c4---gepidipesenuwukunuteseja.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/rufuvekogijaju.pdfIn PDF document text
    • http://sdds.be/userfiles/file/11445839639.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/84839753695.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/11433077597.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/3457402738.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16135586a907d1---22621771592.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/monarenobederikiwaza.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/58957567255.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613016d933e0f---98925670929.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/82659512174.pdfIn PDF document text
    • http://indemo.pl/Image/files/gowidotufeledilomutofozul.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/48864993640.pdfIn PDF document text
    • http://mskabel.cz/UserFiles/File/91758277845.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/lefedumijikepu.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/46659898628.pdfIn PDF document text
    • https://garnet-medical.com/userfiles/files/3328853150.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613268dfca943---xipasesuju.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/57e86de78925c8c921640354b1f0dd30/46534646555.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210908170019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=anatomy+learning+3d+mod+apkPDF 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_off0000dc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 10928 bytes
SHA-256: 3eeb24f9ccebab42b39336e8dcd54e57d9827e39dc7b657e425f35c62fdc5ff8
font_02_sfnt_off00010d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D84 21072 bytes
SHA-256: ffaf30fe6500e9458bf7dbaf4a7073004bd2c07bb1a5651f80bb74c9fd208d8f

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