Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0171decdce03249…

MALICIOUS

PDF

65.1 KB Created: 2021-08-14 11:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 2bf327687cbf298ee3ee7d7ca0a451e4 SHA-1: 412288270f3ca21ab2f110da029763b6bb0a18f7 SHA-256: b0171decdce03249d84b54bd74bd338c712620b8aa371301d0310ef80af22f21
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to untrusted destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9143

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://infrive.ru/uplcv?utm_term=dominican+republic+map+images PDF link annotation
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/0a86be19fc02bc39c219cd408520377e/19371425553.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4207e54b8---wusuvumisegol.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/78333954093.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/paxapowexinizedekij.pdfIn PDF document text
    • http://chongros.com/userData/board/file/18871741473.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7299d2396---97122950498.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/vobukiwarevetolare.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/38620bb3d03e310554afb2ca12eb6601/49236239609.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/3be41d391e402741b679215f3a81d721/36295253887.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/81259016885.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/tozisixikap.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a4df5fd8ab7---38336781657.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/tinodedot.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b15c74994f---metirozurepimulozizare.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d197c3f5e9---70868119372.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/bakozivatenagoneka.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/9b6adac5380040af6d61283617cde180/gamif.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/donobaxedej.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be859f070d5---fuzinasu.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/saxuripekimomir.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8406ecafe3---19131292253.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16071b7a4861d0---kopijiwuzipizobabenazesub.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bf47cf091---valukogiru.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9B 10860 bytes
SHA-256: 988d7a61283645080938e1529844614900edfe8b89ef0226dcf9caac61accc48

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