Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d102d3f6801f8d8…

MALICIOUS

PDF

86.5 KB Created: 2021-09-23 02:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3df73d11ca534f65eba19bf92131f755 SHA-1: 2efe33902c7ec70400bdec86301b182f8300f5df SHA-256: 0d102d3f6801f8d811ea4d42286930b4b6f255d9dc88af808c2be36c68f38b94
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on various domains, some of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure suggests a link farm designed to manipulate search engines or lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://citronel.com/userfiles/files/narapemeterife.pdf In PDF document text
    • http://dungcucaytrong.com/images/files/89863723041.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/36322585647.pdfIn PDF document text
    • http://monikaknoblochova.com/userfiles/file/56253149521.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/25264757619.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/77047806993.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/26765655918.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/90187546725.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/45652906163.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425acbc2f13---finivowufasuwegafale.pdfIn PDF document text
    • http://allycatering.com/userfiles/kizusajudenijuw.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/xopumopubanizumaguj.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614086d767905---9345493018.pdfIn PDF document text
    • https://groupekineconcept.com/userfiles/file/18350972774.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/zerodas.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/161489320c9f90---xexusodux.pdfIn PDF document text
    • http://hcwan.com/userfiles/file/65338052267.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/pakolapujipelunegaxanonin.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/68939061018.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/90058024522.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/161313d70ac916---daxodu.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/dikidolero.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/55794310654.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/muriniwozirak.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/20580587140.pdfIn PDF document text
    • https://desco.scp.hr/files/xadekudatomesazubisid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=why+wifi+not+connecting+to+phonePDF 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_off0000ec25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC25 10476 bytes
SHA-256: 3dba898451fadf2f1970efa3b98d0a22ac103ac6061939312bffdf96612b147e
font_01_sfnt_off000103f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C06 18624 bytes
SHA-256: fbca336adce272e7f93e14d199566edd795381f32ca026f04c73914df53afeff

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