Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b649141d450180…

MALICIOUS

PDF

84.2 KB Created: 2021-09-02 01:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8a30685d5501eb45065ab5c3aabf7db5 SHA-1: 8ab8c0e3e2aba59707f2048bb2f8f28ff22fb99a SHA-256: 66b649141d4501806c569cdecb5d26c80c758a1898e27c48ab762784698f20c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the link farm nature is evident from heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801de82208e---vipujas.pdf In PDF document text
    • http://guanzhuli.com/userfiles/file/pimagijupoxiburimo.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/f20632b12c86f3a4b5c762978f5e8649/wuvidetazutiwojiluza.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/cfe8d30986cee0aa7344eaabb5460584/86610243431.pdfIn PDF document text
    • http://614move.com/clients/4890/File/wazudujejorarazugebum.pdfIn PDF document text
    • http://graficaeformazione.it/userfiles/file/73146093543.pdfIn PDF document text
    • http://lalinpress.com/ckfinder/userfiles/files/81765115019.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/susexusamekuniwonefo.pdfIn PDF document text
    • http://vodnik48.ru/content/file/35288261185.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/15705297260.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210803184257.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/mugamawitetadavokemug.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210618_A17E0854D83D1A6D.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/dotufegenejukubexarunox.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/lofizi.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e04c0d8676---xojotidilarofuteneted.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/ecd8be3d1ef0149e0eb221fb0e218d2a/38664368123.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76371068288.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/bodedutomaxanibuteg.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/30774082695.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/cc85d3aeb2dce723f1de2791f7688bdc/48358056232.pdfIn PDF document text
    • http://earthtalismanjewelry.com/clients/b/b2/b27d4d76c51cd35ccef873a204118430/File/57257208951.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/61820781391.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=toeic+describe+a+picture+examplePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F4 20872 bytes
SHA-256: e530ad175636e3b44fb01aa108efab659167067eff51beeb73476049768b1707
font_02_sfnt_off000129e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E2 10876 bytes
SHA-256: 9b75480c5ba09bb2e2e9c42c11077a9ebee70fbde0c1e46d2099cd904a2d35e9

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