Malicious PDF — malware analysis report

Static analysis result for SHA-256 800ea771eadee76d…

MALICIOUS

PDF

89.0 KB Created: 2021-07-25 22:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d8b5af82244fa601cfe7ab0ac80aa3fd SHA-1: 1e9f0cc1d40ae1424da85a9491e29e565a80f257 SHA-256: 800ea771eadee76dd695ad19f6d5a0b27c2a9d7213be25752c8961a0d5de9bc6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to multiple compromised WordPress sites, likely intended to host and distribute further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting an attempt to evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/0df2d2dcde8338db8670266c26bf0af5/64515328623.pdf In PDF document text
    • http://melly-incendie.fr/img_db/113089430.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7538822c1c---kamagotuzukolepi.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/15849071705.pdfIn PDF document text
    • http://stcforanebanglore.smcim.com/www/js/ckfinder/userfiles/files/remipujisedawowefobami.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a490f864e14---bixokuletaxabonura.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd74945d64---zefaropu.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7da1ccf143---37185976879.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7c3241020---kipupixomejika.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/pafasadebewejolawotu.pdfIn PDF document text
    • http://smithmaloney.com/clients/3/32/32eae1a42220421eddab78da2f55685d/File/66286260338.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/24074671912.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/fd8bf832e296f6d7493c51dad81cb10b/51083772333.pdfIn PDF document text
    • http://come2menorca.com/images/file/57604224982.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe3ba26a3c---88452736211.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/87237877869.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1ff47fc46---89066286195.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/45653251191.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096051dc42a4---48266056880.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c977e0408f---zuleredelizedodubavafud.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737196e1c73---38544353227.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/3552748697.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=dibujos+kawaii+para+colorear+de+princesas+de+disneyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29D 11072 bytes
SHA-256: 0a21d7dab38d701dd79bfa17b35c54ef370fed54f2336202e131392ad40e4e3a
font_01_sfnt_off0000fc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC53 17380 bytes
SHA-256: b738cac7ae8dc03d3e3da26a4bb3e2caf824e62dab3e2d7bcf1b29839e8b96ba
font_02_sfnt_off00012806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12806 16080 bytes
SHA-256: c9fa871d706934500ba7362bcc2679cd089fe7f1d29a584b92b55675ed6be739
font_03_sfnt_off00013d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1