Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebae7d72657a2d32…

MALICIOUS

PDF

75.5 KB Created: 2021-09-06 01:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9a265de49c764e2601ff61b568329d37 SHA-1: 46f349210d770a86327f0126e641d50c46c44cdf SHA-256: ebae7d72657a2d329b72430072ef604d22a574bd74d92ba64b8f63055b2c9566
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised WordPress sites, indicating it's designed to lure users to download further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing malware. No scripts were extracted, but the link farm structure is a common tactic for initial distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e97fb1ecba---womuxedorilupevagadofobe.pdf In PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ec4055d79---81740454523.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/ff94cb0c2b65ea24937633777b08d086/fowofanafowovix.pdfIn PDF document text
    • http://dahchen.tw/userfiles/file/48682394752.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c0650271fa7---82764072930.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9f4dee224---53216966470.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/88908499346.pdfIn PDF document text
    • http://klefmarken.se/upload/file/93890733422.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/32100584670.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/nalemukisapixifavises.pdfIn PDF document text
    • http://kelakewangshangduchang.a9188.com/upload_files/art_files/files/20210905_210231.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160fa3d8dcb2ce---joselixugawevupinomaje.pdfIn PDF document text
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/tegesunekune.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/kudinuzarowolufib.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/jukosokim.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/22062061878.pdfIn PDF document text
    • https://rosycaffe.com/file/87532709443.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/21229116418.pdfIn PDF document text
    • https://unitedpetexpress.unitedreloth.com/ckfinder/userfiles/files/deregufujejixamuri.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080d2599663d---pizumajulowomesedujelav.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/sonazijuwavo.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1612399c963d5c---71640897463.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/45141673487.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed13b4bd5df---zugokotekonoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=colonial+america+worksheets+for+2nd+gradePDF link annotation
    • 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_off0000c07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC07E 17612 bytes
SHA-256: e70f033e6613934938dfc6dbf18e2cc154c3a709f9c6c8cfeb6a10936284793f
font_01_sfnt_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 11252 bytes
SHA-256: 856911a4469c25257d0934d446c0ffdbfca7be8bbfb56cf3d3e4d596f1f4b8f8
font_02_sfnt_off00010808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10808 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1