Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e18d7402f7c998…

MALICIOUS

PDF

71.9 KB Created: 2021-09-07 18:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 67cab0f987d288373a8c315c226d3ced SHA-1: 163817629af8e52f7a7a7a16d14fb7f5247594ee SHA-256: 71e18d7402f7c998d0aa936767ee7bb403ec080281d5446a34f9cc6d465bc648
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://nomylo.ru/uplcv?utm_term=float+switch+wiring+pdf PDF link annotation
    • http://kondicionery-ivanteevka.ru/upload_picture/file/32980607953.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/bexakusipebovewebewopos.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/ub9779tnd88r985an95tamqobf/xelanofifem.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160cd7e1c98f5d---2371796724.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/50412125371.pdfIn PDF document text
    • http://gute-reise.ru/i/files/files/wusiwizow.pdfIn PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/zunoziwodazotedorulux.pdfIn PDF document text
    • https://avflash.nl/upload/files/30037586977.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160abe60811abe---28265220616.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/f995hk8qp40pjjij31g26mtrrd/depalevisuvogujajulasegam.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/58141224317.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608958b3bb3e6---79948900398.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/79699428005.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///bebepasudapavu.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/g37jc0rd6cv3erbnm7u18asdkj/polipijimudas.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607129ef69a11---66217611500.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/wepenozikomigakusanufoda.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ki5tksvut9m840q30s7dqp4l4l/10829044017.pdfIn PDF document text
    • http://salt17.com/userfiles/files/62767233.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/3bflfuh39kf5oapq0g0sshgmfh/19973647028.pdfIn PDF document text
    • http://painttechvina.com/webroot/img/files/nodozoverawunumulo.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/c71a8b1968725e8a3b4ec8adbce952db/82153070252.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d9d7f7d97c---pizopewujenovatejoni.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_off0000bc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC41 14576 bytes
SHA-256: 38badb76ca98b6607a0616c4aae0bc6ede5a8a48795abd73dda37d9c0129c9d2
font_01_sfnt_off0000e0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F6 10832 bytes
SHA-256: bb5fa6c547ea1ee9aac9a5c7f6e1ea3b07db6d439250d29216851efd56ec094b
font_02_sfnt_off0000f9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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