Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b68d9b536371290…

MALICIOUS

PDF

89.0 KB Created: 2021-08-12 09:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 09a46a30023be35b694acd8f786dfd7e SHA-1: b35cdff334b9b6c100a2274cd048e26c82261d3c SHA-256: 0b68d9b5363712901896dc575ea2b20b1211bb2d11f4dc6d3cecc10580c55065
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous external URLs were extracted, suggesting the PDF acts as a lure or a link farm to redirect users to potentially compromised or malicious websites. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://cructi.ru/uplcv?utm_term=exercices+triangles+semblables+4%C3%A8me+pdf PDF link annotation
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/mojaniwabapusadonipiti.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608742c79815d---relawidijigodofe.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/kumizuveluso.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6s171aaflet7b55u21p9j29n72/81814012163.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/konekerutumitivowupoxawud.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/nozajixu.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/78632785808.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0d3ef386f4f45e3c261006b4d605c5b1/54462878449.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099d6ddc52a0---jixozazebizololejijez.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/xafenugetogimoliri.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/8fd5p5ldh8j3ue2r933jcrmmsf/donaluxigobar.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/b49a47585975716fc95bbe843f8c36ed/datugakefeduxumepidumub.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/95343052683.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/g9vjo5s9nuutblblaef2u1our5/xorutumutadedij.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec68bc2719---17531669193.pdfIn PDF document text
    • http://come2menorca.com/images/file/domexisemesadojun.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/70967385881.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/db14af6ca8c73aa707fd16d2bda971ed/munepeje.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/a13db72a6f11e194d19d820f07a56ade/38741724067.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/wenekaxunubaredefusafe.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/4536138673.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/zaxik.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_off0000f13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001094e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094E 18696 bytes
SHA-256: dcbec73256c4c63d37b01ca55b4b9f33353e6bceb30f1f631ca08664eeb77c2c
font_02_sfnt_off00013971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13971 11300 bytes
SHA-256: dab36ed9817a8a4f38fe79cc3c40e422c134327d7f258b41bafb8061c8513726

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