Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed96394e0d216b64…

MALICIOUS

PDF

85.3 KB Created: 2021-09-18 01:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c91f627fd31ed1fadae4f69429883e3a SHA-1: b36890cf8053ce0145e654f372a2e221e8cce17c SHA-256: ed96394e0d216b64a793f33f93f2e5ef799729cfe47323c7dbd1f3b5f52cf503
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple external URLs hosted on compromised WordPress sites and other disposable domains. The presence of external URIs and link farm characteristics strongly suggests an intent to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • 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://pixomot.ru/uplcv?utm_term=war+of+tanks+apk PDF link annotation
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb6aaccf81---vegufofupasu.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/miterebexafimofuzojosekun.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/juminovaxakogedimav.pdfIn PDF document text
    • http://velisend.ru/photos/file/polobinewa.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/teniwuwadoxepixeliko.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/80717506702.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/43064631447.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f43fa63d89---pivujejikodu.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/17316863891.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/jedogezaxowone.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/3efac744f0e84830cb8793dded1f1570/xukixuzal.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/rovupirizepixaxatekixiwa.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144089086a78---wufefenepulonejupegis.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/29494840916.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/25204791641.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16137633757490---92408286281.pdfIn PDF document text
    • https://www.almuhja.com/ckfinder/userfiles/files/nijetesofa.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613284eea4cc5---61353365406.pdfIn PDF document text
    • http://shinyoungvalve.com/userData/board/file/59799391721.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/lemokufuwoke.pdfIn PDF document text
    • http://weingut-suppan.at/files/felovuzusivivojebodalali.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/pekefusowutusinizanesoza.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/88426782145.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/86050069230.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613df1541d048---35805331873.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_off0000eba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BD 10168 bytes
SHA-256: 4aaaca6f35e89cc23eb313f179ec00c29f0860b1c8b9f43e2bb18d9fe195f7d9
font_02_sfnt_off00011aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA6 17540 bytes
SHA-256: bd4c37df7d59cd652e81d2d822e60bbe76efb6bc16155ea959b1725385ce709c