Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc64b081b5420b4…

MALICIOUS

PDF

96.6 KB Created: 2021-08-10 21:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 3c8a9ecdc75dfac493371ce96e5dc24b SHA-1: b366d13b409da09d24ae8f4f0fd49f77ba4be7c1 SHA-256: ebc64b081b5420b46d2957d4bf4d02d3566f4a99ded2d9e950fbfa166b36e44c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=signification+des+pr%C3%A9fixes+et+suffixes+cm2 PDF link annotation
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/92ee20f4a0583877a418613dc336f9a9/35539258664.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc03c524b4---18793025473.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/bonupeluvisam.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160959965c93af---72292341095.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/72on2kfc3j6tmg5dsfnv0st775/kuvitu.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/1c21e83f3305c582864e10b102760674/53186429506.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/d766856cc3135f6451e21d7a071dfb36/lodinuvaxidole.pdfIn PDF document text
    • https://senhewood.com/d/files/butiduvajisezikem.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074aa5f3f944---sidoratilenizam.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/binasilawajafupagakof.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/70235817539.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/gagowufinilodigizini.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/xitilefozarejivijaw.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/likopowuvoferiboxuka.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160804030e286b---gapileliku.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/19983377832.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f491e9ca96---kamaxokepepoti.pdfIn PDF document text
    • http://pr-dienst.ch/file/50899804173.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/84984839056.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210713_7FC1AF74652A0B74.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16090456401089---wexefonabixajuvu.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607964e15df20---davaduxiwomejewazutex.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5122155617.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_off00010b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B96 20196 bytes
SHA-256: 5898817691643b41c3f5389e42d4dba8b9a6d2597e43bd0178122f04bec78d31
font_01_sfnt_off00013ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000156d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156D3 11468 bytes
SHA-256: 5e7df690afdfe7c36e0734df47de99a908529412890702af9baa65083b9f518f

Open this report in the interactive analyzer, or submit your own file for analysis.