Malicious PDF — malware analysis report

Static analysis result for SHA-256 b896e69c9923da65…

MALICIOUS

PDF

80.0 KB Created: 2021-09-17 22:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8b3350e17176079f08cda1145619fce1 SHA-1: f35f77a7f583668b897dd65920543824b7056198 SHA-256: b896e69c9923da65749398e253ab14d52496e05dbd0e617c546b655b1e909506
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to link farms on disposable hosting or compromised CMS upload storage. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crewmak.ru/uplcv?utm_term=free+search+volume+checker PDF link annotation
    • https://intrastorg.com/userfiles/file/jigapubefudefore.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16133b357badd2---janerabekega.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/jerinivalex.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/21336544863.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/41455890769.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/6912614129.pdfIn PDF document text
    • http://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/moraraso.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/gufafatewevuganudoxufe.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/65851782867.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/fazimetaniferinofatijirup.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/gerekelowarijimalopifom.pdfIn PDF document text
    • http://sweed-trans.eu/ckfinder/userfiles/files/jodidurubenagejupog.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/dovexodewodedomo.pdfIn PDF document text
    • http://leguido.net/files/puwiredejojedulivip.pdfIn PDF document text
    • http://genarchi.com/data/temp/file/sobisawegukudubumozu.pdfIn PDF document text
    • https://nwdglobal.com/ckfinder/userfiles/files/dexekopaw.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/pabanugisiredovavus.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/putasak.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210910175057.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/21876165302.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eebf43ef45---bigeboretirupak.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210912_35849ED88CF57444.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/96909655784.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/0a4cd557f181f65ef7e7e39277cd49e3/rizoza.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144ada047843---divifowelajutifuwe.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_off0000d570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD570 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED87 10436 bytes
SHA-256: 4a07017f8f47ced5fb4ae6ed19ce992e43df57f3aa8f7811a2bad6fde5676442
font_02_sfnt_off0001053d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053D 17744 bytes
SHA-256: 1d58c0e07d87b370f7f32fbd750d7be2bba54eb0a5dbaa1c5f4a94a5faaa2eeb

Open this report in the interactive analyzer, or submit your own file for analysis.