Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ba6b1f8168c526…

MALICIOUS

PDF

92.5 KB Created: 2021-08-20 03:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 062774df12f6eff6d7cae9a73e9a1a90 SHA-1: 6edb6d494e5bd776c26bb2766230ae6b9cabdef6 SHA-256: c9ba6b1f8168c526ae6b587a9d3a13a7f1083b8acee1188af1146a4c8528576e
196 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, and it contains heuristics indicating a browser extension installation lure. The document body is heavily obfuscated, but the presence of external URIs and link farms suggests an attempt to redirect the user to malicious sites. No scripts were extracted, but the overall pattern points to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/8ac585fdb6cdf664d8c0c9f2d3aedca2/gadaxefezowexudadivoro.pdf In PDF document text
    • https://cooperspick.com/files/79688561877.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/vp1ipcti6tfo9bh7uutv8bn7k0/16901592668.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/d6qh0l4mirdrmi1dsl4ccu1ud6/50794579937.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/22625013184.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/7305c41f1b3339ce06c1d2d11248e5c4/pariwobadiwusuwebidege.pdfIn PDF document text
    • http://cecev.com/stockages/files/pawowomer.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/o35j3oskfio2fid67r11lvfb6f/dogevozubadigana.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f25b20df98---14758298759.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/pomikixoresumakozikik.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/542a8a424eb890b40b18c0f4e7612cf3/webuwiwinopi.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/31836167809.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/79611540393.pdfIn PDF document text
    • http://thomasbelldescendants.com/clients/40432/File/77279156541.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/66363392680.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/fa93a9327f7534f795a6f31649335b3b/68246069647.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/1d0a8bf5765e3c783ca69fb9d5384318/buwekodipofak.pdfIn PDF document text
    • http://podushka.by/files/files/47256833931.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/82ba5b93f5ce3c1ddf4b859cea407a83/bedematefozogoxabux.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/t2g08b2o1rhv7i4ome7rgp4ub2/83881586456.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/73472362859.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/n9binvmlcqcdqhhh7qke9o0u57/85681818177.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2ea995d725772995c8c90688f7deb9ba/kopebekizakupabesova.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/9gia6t9e9859r7fsoqn100j416/judorulomepuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+do+i+make+a+bitmoji+classroom+for+canvasPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC74 11140 bytes
SHA-256: 64fbd392ad7e25a83e4927fffd3c9b9efc967bc09ca34875641715e0e174eabd
font_01_sfnt_off00010669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10669 16940 bytes
SHA-256: 1bb66e1b22c5179b3ef6a4b07f7e1e3c42ae5849562f5210819c6fbc2b9e6ef4
font_02_sfnt_off0001324c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5D 16520 bytes
SHA-256: 17dab69886bbd3ec2a6b7f0b1d65c3601f0d4afd9e3fe3dca6a26fc3206f9cfe

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