Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee5c0817550de99…

MALICIOUS

PDF

89.4 KB Created: 2021-08-27 04:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ed7317ee0d270442d32264fc1d3b75ac SHA-1: 1b0889f5bf8ca6dec90198414e3f9cc9543fa45e SHA-256: eee5c0817550de99e8c9a34ad551cac904106fb31c2b4a58ee326209f1a65aec
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple domains, many of which are hosted on compromised WordPress sites or use disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9702

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://evrenmentese.com/upload/ckfinder/files/28646171011.pdf In PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/bapanedawunogozen.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/betiz.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/9c0e9f5eda7df059c0dab6c15ce4328d/kazetanovupug.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/9b0ab292ce7bc5e9743ef1f7386a4291/56200819797.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/40749683916.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210804034123.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/39f9beb4a633cbb88be5aa7def0223dd/kesokigelefisozep.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/zaginase.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/jubepubulumazagolubow.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/bidadikugimizo.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/88901087375.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/birogovutuvatoneda.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/jaxuripuxamodakiwu.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/62386752643.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/21254638560.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/78978799263.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/0e99ce5ad741924ae9c93f7aca48e562/peditujixa.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f38e943db8d---dokafekajuzetu.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/lejikamoralomokatuxewur.pdfIn PDF document text
    • https://ijpdua.com/contents//files/jewenetudu.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/27629e06a26346f1dc32e6b42b8f09ac/luvamujuzogizuja.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/5b64jbcudbq4lgkn3jle55shhl/balisa.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/lavowotu.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/82966595811.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100648833ca1---88746972875.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=rrb+group+d+2021+exam+datePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC86 11008 bytes
SHA-256: 0aeec2b7c360cd7cc1586e9ad72b4d2dcd0121ad309de32618dc180ca1d5943b
font_02_sfnt_off000105cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CF 18584 bytes
SHA-256: 53b79dcf09b427ecb2d98c263a9f25b783e584868905e43374dfe0d698747c11
font_03_sfnt_off0001361d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361D 16092 bytes
SHA-256: 29fa2f2cffed8b46d59586e33217a02490ad06086291cc63fb766f7e89fc747d
font_04_sfnt_off00014b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B57 2048 bytes
SHA-256: 21f9df20f227e8d8e40da5b43cfddd00bf1dede15ca1231093bca9ffa6c49901

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