Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9eac7a8065950d…

MALICIOUS

PDF

84.6 KB Created: 2021-09-14 10:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 95b1919535f409fef1be551279ca7f74 SHA-1: f3dc0ad422d0c0336e01d8478071491db5c086cf SHA-256: 7f9eac7a8065950d092cad12608fe5163879d238554ad6d6944b52e9af4ec897
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains numerous external links, many pointing to other PDFs hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to distribute malware. The presence of a 'download' button lure further supports the intent to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://philabc.ru/uplcv?utm_term=wps+wifi+hack+app+download PDF link annotation
    • https://communeouchamps.fr/userfiles/file/buwajasijobolajilej.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b28c45e5c4---sisezo.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/86030961161.pdfIn PDF document text
    • http://pokrowce-ochronne.pl/Upload/file/49591800213.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/6f3ab6d3d7ccfd337ecabaec56cf1ac5/2970118824.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/wurimaverazikava.pdfIn PDF document text
    • https://uangraja.com/contents/files/livutapolofo.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/161314b80b65d9---vegukuzovim.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/80510119458.pdfIn PDF document text
    • http://lblussana.it/images/file/71696701800.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/96902477733.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/rupolazumunumutupefe.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/88519081737.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc7eabb41b---21907045629.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/soxegonesozof.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/gebokateb.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/99955294368.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613af67fb23dd---gutuweburap.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/16221988422.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/41920187974.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/76421172210.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/6966889865.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_off0000e6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D5 10560 bytes
SHA-256: 22de9ce60c7b43504e3d450439181fa230879fdd720d2ec94d22e36140dd5b82
font_01_sfnt_off0000fee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F8 17504 bytes
SHA-256: 40e8e50d7f4c9211540372748a508d0496f5ae82178a5cb20e4a337a577f9fd8

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