Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d46e84e8a9a171…

MALICIOUS

PDF

82.5 KB Created: 2021-09-16 13:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 577a946bb36c11377150a68be2747104 SHA-1: efa206f8be593f615b72f25d700c622a6bd7cd65 SHA-256: 26d46e84e8a9a1716e8bfee7feb93d1099bcafa48f167f7777ec6c7f42c71a88
196 Risk Score

Malware Insights

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

This PDF document employs a social engineering lure, instructing the user to install a browser extension or update to view its content. This is a common tactic to deliver malware or steal credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, and the numerous embedded URLs suggest a link farm designed to host or redirect to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://oniceh.ru/uplcv?utm_term=apps+are+crashing+on+phone PDF link annotation
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614184cae1cd2---kijujolowosagetewid.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/3ad7d013041a2970b80543d5439238ec/dezemazuluxuturufe.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/dbb366db7ab7dc523955d105f68f6a8e/rivexesamazewejat.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a45f625c9---11213253079.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/sixanopataxifepolixe.pdfIn PDF document text
    • http://vrajacreation.com/uploaded_files/userfiles/files/wefubefijexijatemilonivir.pdfIn PDF document text
    • http://hanleyresources.com/images/82086482028.pdfIn PDF document text
    • https://hoongnau.com/upload/files/44253174906.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1631608033.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/98da0c188be05e5914a9464bab8d52c1/vategofobeverinuvi.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/48835356021.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac747b05f5---dofuduretosara.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/35269074539.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/26111362962.pdfIn PDF document text
    • http://oodow.cn/upload/file/210913024711468699p5t62nn8by78.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210909140321.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613411017d8f9---rakozurefozigusidir.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/jisodelupomaro.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/limunarijukuwamusofed.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/83945122659.pdfIn PDF document text
    • http://merwepizza.com/upload/file/50732629324.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/42179578305.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/58876005286.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/benatamoxovojutujades.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_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF557 18424 bytes
SHA-256: caa09ab3f1f946b444b04df1445a0add987f0b144a5d9b6c3e0a062ec26415a4
font_02_sfnt_off000124a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A2 10492 bytes
SHA-256: a8f8f59e637f69921624032b36b66890ff9783fd304b196290587d28e65a7e71

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