Malicious PDF — malware analysis report

Static analysis result for SHA-256 8713a9dba89500a6…

MALICIOUS

PDF

80.2 KB Created: 2021-09-20 23:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f29c9761a387b76dc8f95afcaff327c2 SHA-1: d0795335aca53ed6b9080efb160d21324cf9e1df SHA-256: 8713a9dba89500a65bee6aa658c399e9c78d2408dc66cb0284e1daf8e872c038
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojanized document. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://allytemp.ru/uplcv?utm_term=batla+house+watch+online PDF link annotation
    • http://poney-club-romilly-aigre28.fr/userfiles/file/dogoge.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/69662451823.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/nobotupu.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/novufa.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144ad8d18ced---22787045874.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/fijedofagezunoxoxaleger.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614513a96d0e8---wetogonowejubedasusenevam.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/91993443708.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/22995590554.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/numiwivudobijurarudusuja.pdfIn PDF document text
    • http://arnoldbolingbroke.com/ckfinder/userfiles/files/jodajiwaxoranagig.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/xumeziwotibotetosogiz.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/zibigonem.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/pakeze.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/xazuruzawerodupa.pdfIn PDF document text
    • http://sin-hua.org/userfiles/selonojo.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210901223453.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/gutususipasinexiv.pdfIn PDF document text
    • http://lovesenergy.com/file/19691521509.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/44182716022.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/pudexerejewuxotix.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/4e4bb9d3e5a5ad9a4608e93dd7d373cc/xolodaxuxedukajuw.pdfIn PDF document text
    • http://cecev.com/stockages/files/wuvasefut.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/walibinowemuxalujasugade.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/64055537173.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_off0000d66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66C 17308 bytes
SHA-256: 41ba128bec4415bc5e0de2051f1001e4284b232580b5d5903886f10fbe36e1a2
font_01_sfnt_off00010354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10354 10464 bytes
SHA-256: aae19e48a1ff1e08ac43fda3688ebaf7278119402ab8b7e5932a29959d04529b
font_02_sfnt_off00011b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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