Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f920523c4607ae…

MALICIOUS

PDF

91.4 KB Created: 2021-08-03 20:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 5f132f2ada09f89c6704d8622d1a7343 SHA-1: 55c7cafbd7ba406a8bee55cb6a12c26149f5cfc2 SHA-256: 59f920523c4607ae44b29c9352068ab3d6e70897e1ffb0e52bbc38f1ca9f241f
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=kaththi+movie+download+in+hindi+300mb PDF link annotation
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/3069e0f180064c503c56a6ca33a20e73/saxibivumofunalajeke.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a952a0a64eb---boxuwapepozokugilaribo.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/501fb4861c77ac93056543f913e9a3de/gopuka.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/0e3f56821e4910471c444984eb83ba0a/9658657512.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096fc9428d2b---pojelinasoned.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/xuduruzawujunanob.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cdaf8bdc8---xirejejewisipo.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/8a61a2a2202c81d51a0bb08da2c4a556/bavawivez.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/8c28c23a970b574f89aa3fb1918a84b4/ragexegodiwabadesiw.pdfIn PDF document text
    • https://schmitz.cz/res/file/vilifiridazuk.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079ab9db9f0a---fezezuboxorenexuzaxizase.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/a5328fd8598afdde0641fc1da9d32480/97429829898.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/721bc6b888180c273cae28c3f57b9862/nopumenod.pdfIn PDF document text
    • http://gyobel.itpublic/file/3650533224.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-8-2/20210802061314961486.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/jusodesulerakipufukidazaz.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/3e2089be51764bbbba4b4eb9c0b60294/kowasukevatenolinuzob.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/nopukorovolimezoro.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779cffa0872---48317653436.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160755e6854295---rujevudupobeni.pdfIn PDF document text
    • http://kargo-box.com/uploads/files/napogesura.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/sazuzeliveroge.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/f91181a8d019ffc746c10c0d154fd96d/46978672407.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_off0001027d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 16960 bytes
SHA-256: a7cc8f3562022cf625ffa71c6e3b8c505841608c088cd78ab5fb6e3897fdd493
font_01_sfnt_off00012e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001468e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1468E 10824 bytes
SHA-256: f3a5f88dfd62985b47d6bb8aca46fe5a0b8da194bc2085f41a1de0b262b18667

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