Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69b4d0b69c90252…

MALICIOUS

PDF

75.5 KB Created: 2021-09-05 15:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 52d7ac8d74fd29b67a5b3823ff9d081c SHA-1: 3143362a5731391c9ced8494c4131a2c799a1cb3 SHA-256: e69b4d0b69c902520d532d596af19e9a18ce1c20d9640e3d0e9f133b27034398
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute phishing or malware. The presence of external URIs and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://crewmak.ru/uplcv?utm_term=decimal+a+octal+pdf PDF link annotation
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/a0c6548b2dc688ad484fbfb906c59695/xorebujofasofuz.pdfIn PDF document text
    • http://duplisite.com/userfiles/file/57234254550.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b39096441df---49782594426.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/2d74c9a78cb83da5c247d5d6510cc779/morati.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/34863124080.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/77142057909.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/3f7de6e28ae7ba2197b530b7d1e2775d/56746296864.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/vuxirulepepis.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/todrolf4cvpu13lq164gtmuu9a/48485590737.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/51190449525.pdfIn PDF document text
    • http://biomedia.asia/upload/ckimage/files/gamurotuzalaxijuket.pdfIn PDF document text
    • http://btfa.tw/upload/files/zomosujir.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/1tqo4rrop7li318ae7elq7p916/62629856180.pdfIn PDF document text
    • https://cape-electronics.com/media/file/80753776024.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/81e64962fa8f0e929fdecb0b40e2fa93/sefukaposuki.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/77411275229.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/76745628907.pdfIn PDF document text
    • http://lordbeaverbrook1973.com/clients/76835/File/23882865680.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afc94a8f22---61477895913.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0726b35f8a---79616156540.pdfIn PDF document text
    • https://actorconseil.com/files/file/mokid.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/80604413351.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b20a0ad74f7---82263297563.pdfIn PDF document text
    • http://vswet.ru/f/juxexuwazatux.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/5098c75a7b63ed96fc7b4c11320bae08/fanukilamikadimiga.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/lukuzuzolemovirez.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4565e41ca1f18b86da056f09c7711aeb/returu.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_off0000c604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC604 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE16 16440 bytes
SHA-256: b4225fb036a2801441ff4890210c0549c38a6bb9749a07287d6cf0c40a81b743
font_02_sfnt_off00010885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10885 10412 bytes
SHA-256: 2bdf8659480edf72cd30aed106a2c4986f5d57f5d1d0341791f2ab45c13a2399

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