Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e1aea9b47fa5b4…

MALICIOUS

PDF

69.3 KB Created: 2021-09-07 00:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6f4409dfc79cce68c46e823744fe6013 SHA-1: c4c2fc1cf6ee3a18b6ad355eb4046cc206c12d30 SHA-256: 40e1aea9b47fa5b4fe2c5735142f88238a2e276de4f73d1213ac4d0fa45311a4
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The heuristics indicate that the PDF acts as a link farm, pointing to numerous compromised WordPress sites and disposable hosting, likely for SEO poisoning or phishing. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6691

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.
  • 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
  • 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://ketchas.ru/uplcv?utm_term=naloxone+davis+drug+guide+pdf PDF link annotation
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f92542b4a---37910504238.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/fofeforuruluvapevo.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/0139949850ee8f056169a004d037dc48/15382575276.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/d62dd4a36b82555b405d9e365a8de3ba/92314198834.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/54298136859.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/ladikato.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a858b08c50d---getemuxijulubiwige.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/6f20b881f4912e077ad5e801b686dbca/ziruxidubabujewobuvub.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/77412567962.pdfIn PDF document text
    • http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/tulujiruvuxukorudorivaju.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/1n2gm9sf49ev3df90d3vo5al7v/kevefaw.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/51296459512.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/zififekizepoxinudi.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/79172931046.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/vereriririgobasut.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/10699224279.pdfIn PDF document text
    • http://dhf-china.com/d/files/begeboben.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/87776608435.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c58355832---rekobulotum.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/57405205203.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/34971138260.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/21192783783.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/68385741869.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD962 17364 bytes
SHA-256: 42eb56b23df12e582a7f3e82c51d2b6bce4122e0cae6a175b73bf15fbc835aed

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