Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe4547f2377a874…

MALICIOUS

PDF

62.5 KB Created: 2021-09-01 15:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 29936d04d62e34a60f99964820a158b8 SHA-1: 1f8f6eefdc771e3425dc4dbeab5da18e3a94f8ac SHA-256: 8fe4547f2377a874d587266011f6953a03a05b82414656661371792ce07f03b1
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely designed to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7005

Heuristics 5

  • 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.
  • 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://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/e25440002ffb07e80c115d7123a7ebe8/zaxosezetewasibaz.pdf In PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/1865o9t37ngangdo0etdjebqr0/8240745616.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610477796e17e---turami.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/sipofabafizafonaziwomu.pdfIn PDF document text
    • http://mtprospectbaptist.org/clients/7/74/74f10a8404da00fab064704771972c19/File/71475843764.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/masuwutufe.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/kna3m6vb2plbfueklmk3pfaobh/25806887792.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/e3d745c26926d43fe65896f318b6fdcf/75975734702.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160ae06d7ebeaa---gewivutonikix.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/13417c06c10b1b7d3523374d7c6f8563/8821516462.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d02ed6dcffd---wigikaxuvefukisa.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/6977dd94823ee97f7f8fede8c7aece86/43819488097.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efd9f98bcd---golatisosam.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/nenamisenikovivud.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/42080030117.pdfIn PDF document text
    • http://technocom.pl/editor/file/dodig.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/aa4a25949d148bc926ceb70d32e8930e/jekomaxifezuwejix.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c161e1db1de---wedolarez.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a578d1775f---85709265965.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/iav48tq9u7r6n7psejntr17qh6/gotitenovasalufar.pdfIn PDF document text
    • https://hlj-vibration.com/uploads/image/20210824/files/20210824224230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=will+there+be+a+season+5+of+the+handmaid%27s+talePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC02 14804 bytes
SHA-256: ab2c77e6207a7251434bffe204cb94bd993827ca1fcb1052555a8e5dddea29e7

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