Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce480d6e838798dc…

MALICIOUS

PDF

84.7 KB Created: 2021-09-06 21:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fcd14bd715563d79d10f40d84d45cdf6 SHA-1: 7ad1d957cef12cb8bc7181c7176c9db85b49eb52 SHA-256: ce480d6e838798dc2d680e26aaddc278aac75f486ba7d0b77dd8f128a4e83ffd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to websites that appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and URL analysis suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://buyyoutubelikes.com/ci/userfiles/files/roredavidowevodituk.pdf In PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/rjv7k97a31r9ddid4ffceuujtu/nimutilaziwojawomivit.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/jezevifizis.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/7335062322.pdfIn PDF document text
    • https://norservis.com/files/files/86388469892.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/23e68d9939ff0992963e50711be79e43/81059931720.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/19058019687.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/62694214832.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/88253795453.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/vogason.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/fojuduwakiwunuramagag.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/fcf34e90b8ff5ca988a95cbc09af1750/73303884784.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/9of4h4uhrd4dp1u5071vadecvl/fuwujigazejitijarujowa.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e552147ef63---67640265800.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae018b4eea4---lofokon.pdfIn PDF document text
    • https://successalpha.team/upload/files/lamikotufinapokewuz.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/bd9fc5a4e5af6059e84aa8ff3cf6b23b/80439387668.pdfIn PDF document text
    • http://blueyee.com/upload/file/170904195258.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160942929b3a04---40496707475.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/696658f19ad8d235651bba23771d2e98/firuronavedagitoguxa.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb6bd19531---vojifulaxugini.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/nosutugolonukebabu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a7d293f48---gupupopudurixodemako.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/727450090.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=quran+warsh+tajweed+pdfPDF 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_off0000dc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC32 21704 bytes
SHA-256: d201e018c8ee431ced3c08e5b5928ed054defd5c47627d29ba1d686944d304bc
font_01_sfnt_off00011503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11503 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1A 10712 bytes
SHA-256: a7ce24051338c3949033f6610e5f10a56118024c88a7004c1e75766b7d4977ee