Malicious PDF — malware analysis report

Static analysis result for SHA-256 22be6ad0d26ee33c…

MALICIOUS

PDF

69.2 KB Created: 2021-09-16 14:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ba1d07a003ad310e809fab6139767980 SHA-1: eeab51f0e2ede7deed8c45e3344913c13b8015aa SHA-256: 22be6ad0d26ee33cd9645dd864cf7d57f4c1dd0daff3daba448b2d637e679902
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16138522685287---rururukodibig.pdf In PDF document text
    • http://abpjseah.news-read.com/upload/files/fulalorigudogazililusib.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/wapivemepudegetixil.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/bovileda.pdfIn PDF document text
    • https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/fenubobekemomuberavopup.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/75578268166.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/70042117452.pdfIn PDF document text
    • http://kietminhrivet.com/upload/files/gazim.pdfIn PDF document text
    • http://ilkjv.com/Images/Media/files/nafose.pdfIn PDF document text
    • http://kondicionery-lobnya.ru/upload_picture/file/27554918139.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/39681020543.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/fizolitak.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd5a33755e---mutekoneruxusi.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/sudavikukas.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/dezikagese.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/vuzupofig.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/waxodemumola.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161408d7eb9fe1---37367157299.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/vodupenufaf.pdfIn PDF document text
    • https://truonggiangcompany.com/userfiles/file/4776468721.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/kezofi.pdfIn PDF document text
    • http://393citizen.com/upload/files/91070069093.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed613cd3d9---91286553995.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/mipiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=super+sidekicks+3+romPDF 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_off0000b0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B2 10704 bytes
SHA-256: ac58b5185c780476fa3feae0ae2e1c4ed176dd33da0ff77028fad1a3867cfaf4
font_01_sfnt_off0000c93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93E 15088 bytes
SHA-256: 3df6fd70c884e33ca54d3b15a756c647e1d3d1f645ec1c0c9e8f0d5379cffcb0
font_02_sfnt_off0000efc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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