Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59000290a7d2fda…

MALICIOUS

PDF

109.0 KB Created: 2021-07-23 13:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 408535b21b473b931ea916f1513f0740 SHA-1: e868771b426a21c00111ec10c1723e32caf79cb4 SHA-256: c59000290a7d2fdad08ee69d9de31ecb1d9a775f0f7bff36fcba1d270260e6b2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple domains, some of which appear to be compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://alteanetworks.fr/img/file/99394125833.pdf In PDF document text
    • http://texmet.pl/userimages/file/somivakiduzu.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/49627738008.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/nasoxomuxibokimo.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/0725367196bb38796147509086d53477/71544434108.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/f3f3aa2e80fd8dc2f73057f989e68bfb/86040522112.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b764349f1---dexatejigawufapud.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/66191620111.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c30b6f11e5c---rekugigoriwawulodalubolax.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/73062132514.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/gofurididub.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/bfabb958e395e016b83778d481750bdb/71506217783.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c260664c811---83627720475.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/16017f87d8cbd0f210aecfa84795de1a/gisavatofisipitudukidimep.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c90aaab5238---18685859575.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd85f2a65ea---wosasabugedami.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/21238b7cbfa28c61ec5847515ebaf53f/48021584127.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/993e06eab8365a0617c68dc1ae0afb20/85879028884.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/v3krhc2875pldj70nsrrloag60/vegipujemamunemulupasunub.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/wepejikipufivodujojexumez.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/nuzaboj.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/48078048638.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=do+sauna+belts+work+for+weight+lossPDF 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_off00014268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14268 18636 bytes
SHA-256: 232142ea1585aeef1a1ae02cfd1783285ebf4e760e1d3d26d183640bcd5d42b5
font_01_sfnt_off000173f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F4 10912 bytes
SHA-256: bbebce405ac4505e1d23c6140d8c792eb59b9134a3ddd2625bb93bfd8a718db8
font_02_sfnt_off00018d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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