Malicious PDF — malware analysis report

Static analysis result for SHA-256 42144f8ea1849229…

MALICIOUS

PDF

82.3 KB Created: 2021-09-06 09:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 68f42de7e6d5e0faaf155f6733ff03ca SHA-1: 94882433e07c88b58f7e50bb06775c72d8ad18e9 SHA-256: 42144f8ea184922994053c738b1637a7323e3acd0f1d1a68c0de7839bcd17975
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO poisoning to redirect users to malicious content. The embedded JavaScript may be used to further obfuscate the malicious links or perform additional malicious actions.

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://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7121948b4---31262416219.pdf In PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/jogakadigafa.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/36335960426.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/68492921855.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/46596585609.pdfIn PDF document text
    • http://hanauhrova.cz/files/25871376797.pdfIn PDF document text
    • https://irantruck.ir/data/file/94339341472.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/46548989d820295d365474ae0e6bf020/75893154710.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/78139741238.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/dujogo.pdfIn PDF document text
    • http://teplospectr.ru/images/files/medawaperobugiwobukowu.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b912248d47---bidakava.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/46981959128.pdfIn PDF document text
    • http://dchs1961.com/clients/871949/File/58224412921.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/gubanarile.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/11787766234.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc0055c6ba---91504105739.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/28866248084.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/4666348704.pdfIn PDF document text
    • http://superpart.com/files/ligepividivibudemogapadip.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e40eb2d7---vigoxososawedova.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ceea79d914338a0d005a74c6bdaf9120/3634723134.pdfIn PDF document text
    • http://short-story.ru/upload/file/libaxaginox.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/9b9059b2fabb27736de9a2217b38df10/rejefunawoxoxivudobimupo.pdfIn PDF document text
    • https://foulardfotografando.it/file/98727887597.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+convert+ppt+to+pdf+4+slides+per+pagePDF 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_off0000dd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD59 11016 bytes
SHA-256: 1bbf179525239daad89e38754792c9ef9126acc22d479ff18a082e1a6da77bb9
font_01_sfnt_off0000f6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F00 17096 bytes
SHA-256: 89870303489e132c5bfb19351590be76bf89559c23397d1ece6da1d4fefa2ad9

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