Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abbe33bce7a90a6…

MALICIOUS

PDF

68.7 KB Created: 2021-09-25 07:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1a553a59ec8efce558893960c10e05e2 SHA-1: 0da37010307944f0820e77df14e6bae66039eb9a SHA-256: 6abbe33bce7a90a6b41d3379a382e75a1dc556d34870fc6e37c3756e8afd0d8b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is a link farm designed to drive traffic to various sites, likely for phishing or malware distribution. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://pistant.ru/uplcv?utm_term=watch+chamber+of+secrets+online+free PDF link annotation
    • https://apatity.verlauf-ekb.ru/admin/ckfinder/userfiles/files/23516662901.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/50072797058.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/53422483461.pdfIn PDF document text
    • http://ruresept.ru/files/file/22477681194.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/46648683710.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613937c189a38---vovowanarafokusaxibifu.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/fokefugaze.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/7pgrsrikopenphjudssl4665ag/57184377955.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/053246f78e465a000b1985cccae7ce6f/sabevode.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135e470a5cdb---fabapufukixufetofotef.pdfIn PDF document text
    • http://citranco.com/users/files/tanuv.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/1589247914.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/f13f9c860e072c5529774e56cbcf4511/50314496533.pdfIn PDF document text
    • https://flexi-cms.com/uploads/file/11859048671.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/84631906238.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/6765305718.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/zaxabatetifovefofig.pdfIn PDF document text
    • https://magnumattachments.com/ckfinder/userfiles/Files/sizekuletazozalomejuninu.pdfIn PDF document text
    • http://dd-eng.com/files/files/67163785597.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/xoxasuvarewiliwox.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/39782096493.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_off0000ace9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACE9 15216 bytes
SHA-256: 868bc8c1c6bb46b63ffebc103daeda9ca2b8d785629ee0ea4c1709501a5c20d5
font_01_sfnt_off0000d32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB45 10732 bytes
SHA-256: 84c215c76fed79fbb333c945fc1bd1330c14f61ed7685e1720257aad825c000a

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