Malicious PDF — malware analysis report

Static analysis result for SHA-256 617ffd3cf97b680e…

MALICIOUS

PDF

78.8 KB Created: 2021-06-13 02:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1b0b4be3134ff1ff1fa51fd17f69d3bf SHA-1: 30e7170cbb0f76b4820915cb93172d098a3880e3 SHA-256: 617ffd3cf97b680e10ae9489173842348dd36cbbdd7c1946ee4a144299696887
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The document body, though heavily obfuscated, suggests a lure related to search results, likely to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8184

Heuristics 5

  • 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.
  • 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://infrive.ru/uplcv?utm_term=why+was+donatello+important+to+the+renaissance PDF link annotation
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9494329eb---fubadujotosoxifa.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609461e4cd083---64167115415.pdfIn PDF document text
    • https://123natura.com/stockages/files/kokumugorezuxutumijakajok.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/28050613526.pdfIn PDF document text
    • http://airsoft1.ro/files/file/siwazoziwoxavo.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073da2828894---pifububifatavupakat.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/4488dc1f2d92d23e92ad8ecd6ae0ed73/xajadoxevukati.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/fafd8eafcd4b363e90fd2fea093679ca/xivewugaw.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d13a21338---36998980757.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609853ba49020---napavobujemugesarekek.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609f65fc12bac---lubosomigigitibetupo.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/d1da694381a32c6bd2c454470fcbd313/41032731105.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5ba45f65d2742638f4f8ec8a37bc00d0/pubebifi.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/fikupebafazazilikiwep.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/jijigevubolupefizijo.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210516063308.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160850cc33c580---50760051513.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4a6fdae12---suvojipenetulekemawak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001110b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110B 5520 bytes
SHA-256: de661aa8cbda396cc758e293b579e4649d055efc197627f0fcf70d9216769bcb

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