Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb4e2daabafe2a4…

MALICIOUS

PDF

136.9 KB Created: 2021-08-06 04:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f9e09888762f0068668b60d08962af2f SHA-1: 196cfe2a3622bfca68ed4e950f50118692162d0c SHA-256: eeb4e2daabafe2a4f4262f03144fdb0d1435b969942abf36ed5792358676490b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9758

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f79cd1d30---positulezarilinabo.pdf In PDF document text
    • http://aostavet.it/userfiles/files/1094228581.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/32d7cbb62093fc5adfec773e4bd35647/82763307458.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609285b533c85---sovejiberugekaliwow.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/81959969853.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/berevepajejanomag.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/53613669601.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d556d71270---97770126307.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/bepadigu.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc29c8c44d---38243504320.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/modigemegetinug.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d455a53d6---pogikivedategugaf.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/vugiviziseluxusodutilu.pdfIn PDF document text
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/kimowi.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/161088d932d7f4---gemitekofexidi.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14a72b39d0---witewilowud.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/23316930663.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/43286993046.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/77606776268.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/b66c3931f0964404edbe739a3d4fd838/getisozu.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/259c7259f950efa335d9bc1a94284597/sevoni.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b77abec9ea0---66598484841.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/roxudavulajunalikugeza.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/muperemuwojep.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/pozipanofikixokagugim.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/54030399017.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=anthony+giddens+sociology+7th+edition+pdfPDF 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_off0001b4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4E7 10784 bytes
SHA-256: 6a320f4213a7fcfa72eeaae1a965736e26d7696d86423901d50dd65aa1b5800b
font_01_sfnt_off0001cd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD8D 17968 bytes
SHA-256: c8bca35cce321550c0b503ee4aab8f7f9a4d1f0631f188a583119da327dd401e
font_02_sfnt_off0001fc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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