Malicious PDF — malware analysis report

Static analysis result for SHA-256 f092b506f17822de…

MALICIOUS

PDF

83.1 KB Created: 2021-09-04 20:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: af3736d770c2ac485548d9acaba97873 SHA-1: fb87ea1e1cab2ac48eb365ed76b149ab7ca4c054 SHA-256: f092b506f17822ded2d3a0052e7dd0860fbb8d2197c786b7a5b585e7b902e99b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://wastran.ru/uplcv?utm_term=split+pdf+into+pages+windows PDF link annotation
    • http://www.serge-valentin.net/ckfinder/userfiles/files/rikapokadifiriwu.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e0eaee9102b---10582000522.pdfIn PDF document text
    • https://5udua.com/contents//files/mujanaxurag.pdfIn PDF document text
    • http://htwy.com/upload/file/84589814011.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/nipivikizapepolalixit.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/zutoxexawasol.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/masetow.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771ea273643---50340172391.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/49532473715.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/vfg6ut7rtjqh8i21ij4b2q53mb/xeganulajam.pdfIn PDF document text
    • https://globalquestconsulting.com/userfiles/files/49568989074.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/58701762255.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ff1589de6---24791611738.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/91523569986.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/filimonizebe.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/7375783309.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/df40e9ae1b42decddc75b73176d1a96b/bezemidux.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//35637121686.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/00db137fa8bb73f55f4955293abdf6f3/betirijej.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/36483377887.pdfIn PDF document text
    • http://altinay-law.com/images/file/80883305417.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/89f03924ec979aeb5a0ed24376e0e3a5/35192607968.pdfIn PDF document text
    • https://beruanglucu.com/contents/files/85348778296.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5e769265c---diwozosubof.pdfIn PDF document text
    • https://agatanorek.com/files/file/podejan.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/m30f0selvlgsfj260unac9enku/mojemiwuniz.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/79640021344.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_off0000df89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF89 17880 bytes
SHA-256: cb76bb45ccc02759688d506adc073ff8b14d2cd180d0d490120918a6f5ad7106
font_01_sfnt_off00010d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9E 10736 bytes
SHA-256: a900f12c3ffe3c02d9781bd33b61650e2e6955e217baa7fda030e9505fba469a
font_02_sfnt_off00012643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12643 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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