Malicious PDF — malware analysis report

Static analysis result for SHA-256 9638adc8e270ca44…

MALICIOUS

PDF

81.8 KB Created: 2021-09-11 18:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 654eb254c944031668373fbf8831db65 SHA-1: da1ce72c9e35dd72a2ebbe39412a4d363b87d7a9 SHA-256: 9638adc8e270ca44b010a2694050b25b572f26bf254b2eddc44080ff55e6ec48
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a credential harvesting lure. It contains embedded JavaScript, likely intended to facilitate the phishing attempt by interacting with the user or redirecting them to malicious sites. The document's structure and numerous external links suggest it is part of a link farm designed to obscure the true destination and host malicious content on compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613593db92978---bugajobejegij.pdf In PDF document text
    • http://jikaramen.com/uploads/files/xejewiwidewix.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58965482011.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/mawewujanifelu.pdfIn PDF document text
    • http://df-2.de/images/daten/file/16265964848.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/35933992887.pdfIn PDF document text
    • http://tlumacz-francuskiego.pl/userfiles/file/dedoxalebi.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/21599666474.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/4075150156.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613befc9c4264---26615450545.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/fanuzalibigugener.pdfIn PDF document text
    • http://offerparts.com/upload/files/7840399310.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/diduvoradavopuwizolomufi.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/sajikomixeliv.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/46974079456.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/161398874ab9c2---42901977925.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/nopizuzemenuwokirekor.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/jerejaretiso.pdfIn PDF document text
    • http://co-mit.com/uploads/files/vipetigivizuperipanibol.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/b3ad9bb743fb6b651ca602da116bee3c/terizifavuwipebazadope.pdfIn PDF document text
    • https://ambalatender.com/upload/files/33210652463.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/58911660389.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/dolefita.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/tekuzidulumig.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/97305671404.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/13423360263.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=blizzard+authenticator+apkPDF 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_off0000d4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A7 10748 bytes
SHA-256: f62fa8b81342f44f775799cd64995f16bd3f7bddeea44b11a580ea486189a0da
font_01_sfnt_off0000ed51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED51 19860 bytes
SHA-256: 1e22c4a75b033124f29c81b28bea0bf3f69c6452ef5cd28cf11b1b9bdc3c9560
font_02_sfnt_off00012147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12147 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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