Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e89d18bc83e3ef…

MALICIOUS

PDF

104.7 KB Created: 2021-09-06 20:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0d2676ec4e343f9f25114aaf8b97af5e SHA-1: 282cadf13720fe4dbbfb0a1b9a9119d46cf3d690 SHA-256: 44e89d18bc83e3ef2f77fd854d210d695a795b79001b42eff9a17201eaa0b9f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous external URIs and is structured as a link farm, with many links pointing to compromised CMS upload storage and disposable hosting. These links likely serve as redirects to phishing sites or malware download locations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 6

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=the+grapes+of+wrath+bangla+pdf PDF link annotation
    • http://adamlegal.com/userfiles/file/48767546542.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/senuwetezozunepemutu.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/1e7b9260018a48b778c802bb6f5bfa44/bazuti.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ls3co2kgp404fb33taflm8qkd7/49893887266.pdfIn PDF document text
    • http://gachbinhduong.com/upload/file/gomomozijelitopewidesab.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925267cb384---damaketokotew.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/78bffdccda71063e388eb790c80819d4/gumosul.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/64751472040.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075d6826167b---45132598483.pdfIn PDF document text
    • http://moffatcountyhighschool65.com/clients/878592/File/bowexixapisenokenanumige.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/bewogoxagowegiluxeje.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/a10b8ad1c79083af258cb321409e58ff/jomadarudide.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/901c1863d998c7ead1bdb23a259351b6/30668781752.pdfIn PDF document text
    • http://italiancousins.net/clients/5/54/54f3d33123424807706abe9154268524/File/taroxonunoxidodop.pdfIn PDF document text
    • http://gibisch.info/files/files/ruduxupewud.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/mexuwe.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071e5b0a9d08---polabuzizesagigofagutebov.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/7098310183.pdfIn PDF document text
    • https://actorconseil.com/files/file/48076891895.pdfIn PDF document text
    • https://dhesient.com/media/19362078699.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/17259f0402e2fa2f4ad2b20bfd30b5ae/kikepexilurixojobojoniwi.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2b8d72761b---faluxikemajatumopegor.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/kumiwoneruwerinideparu.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///juwesikapab.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/9ea85acinr8vk4l2820mt3ee2e/27347072406.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_off000133d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D0 10876 bytes
SHA-256: 0db898baf90676ef024586ca74b387ad8da091cc098631ca6b4b0e13f6fead78
font_01_sfnt_off00014c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C8B 18680 bytes
SHA-256: 5ce9ac73f1f687ddea9b9b76b971939644c1a0bb778a7bd2c830e95fd667a697
font_02_sfnt_off00017d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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