Malicious PDF — malware analysis report

Static analysis result for SHA-256 84adbf82826ac5dc…

MALICIOUS

PDF

88.9 KB Created: 2021-09-03 22:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2e48d18871f6e01f08c51176d8aad9f7 SHA-1: 263d6361cfe29305cf044a97674e7867d3f69cf2 SHA-256: 84adbf82826ac5dcf7d5bf498170bb3dcea31ebfd95b2e942855473cea605f66
196 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and contains numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document text may contain commands or paths that could be interpreted by a system, potentially leading to the execution of downloaded payloads. The presence of multiple external URIs and link farms indicates an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://drafthe.ru/uplcv?utm_term=hyundai+sonata+2014+service+manual PDF link annotation
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/b1643d11bad3db6ae4517ed165fbf71a/xoredox.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/tizasokufex.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/vumogisaji.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/86064929306.pdfIn PDF document text
    • http://qdcmd.com/data/files/fibufijudixubasuk.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/ropuz.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/67168081542.pdfIn macro / runtime command snippet
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/960d18189408ce4f4ab9f68d1aa1b967/13951913340.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/84206470772.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607807805cdf2---nodiribapufoziduvak.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/24180794813.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607581a25f168---vaxuvafoxagobuxusedil.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954c4cd66c3---33519196677.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/15960251348.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082e10845260---vixawulatodesi.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/b146bea10ae8d28d25a73df18f054c20/mubotagufufa.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/sominabuxabagatirazi.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/33298531982.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/73909879535.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/94865211011.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/suvomizelalorawife.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/wozus.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/mosiruk.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/72142648658.pdfIn PDF document text
    • http://akcjonariuszIn macro / runtime command snippet
    • 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_off0000f6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F3 11176 bytes
SHA-256: 2fcec8ba7f330d626afcd5626019c93f11d851bbc59265250128cbb01e894e8d
font_01_sfnt_off00011133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11133 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12945 17280 bytes
SHA-256: 7fb3bbd24e41b86b4ec9a85b8cfa5a162179cfb5901faa30d107eb159c9b8e51

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