Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe3394e30f00e8c…

MALICIOUS

PDF

75.2 KB Created: 2021-09-04 12:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4ba4a06daf7891d6289f39e659f827d9 SHA-1: 2ccd3cc19e70175add14b0ac43a33319d61d8a0d SHA-256: 3fe3394e30f00e8c4726bb736a3d8dae04325705776b9db373508a4cef6f77c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised CMS upload storage and disposable hosting. The primary purpose appears to be redirecting users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://irlanc.ru/uplcv?utm_term=discovering+computers+2018+digital+technology+data+and+devices+pdf+free PDF link annotation
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/40b6b2854a826ab6227d8f73506246d8/68655315951.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/e84f583ab4d1e700d65698989f3e4859/47437770111.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/77067049978.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160919244db301---fejosew.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160752644cfe5c---kaxomoj.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba782ec88b---towegoronulatinov.pdfIn PDF document text
    • http://proart.by/media/file/82530543076.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bae18117c0---16426730462.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/64673775499.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/woziresudedolukukopozoma.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a6856429c43---7341099877.pdfIn PDF document text
    • http://computerdoki.hu/user/file/sikagoguledusosafijoniw.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/036e77ba22427de89c8a359eff807d61/xojazuti.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/gisatopomimi.pdfIn PDF document text
    • http://boxethai38.com/upload/file/xemut.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eb9140f8c---tetiwoteputarojuxekivezav.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/e93eec77d4bb53702c1fadc0e520281a/wetufozoto.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/85522351617.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075a677e40ca---dugukajorabe.pdfIn PDF document text
    • https://solo-enoant.com/content/files/files/sifumeba.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8260b6604---fopetavozif.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_off0000bf94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF94 16556 bytes
SHA-256: 65062cce5ec7ee7177d37a6da508bf00ed9bfd3f33ee5a62423b30ccae703fb9
font_01_sfnt_off0000ea49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA49 11852 bytes
SHA-256: 420f8f828222b27b5433b4b65ac4822e0f55e87d4289488f23ca48f0769be02b
font_02_sfnt_off0001066e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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