Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee63dbfa3037ccb2…

MALICIOUS

PDF

69.5 KB Created: 2021-06-13 19:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd44dbac65308b41d4d9510960779590 SHA-1: 520924668ec35fde3c98f0f106f9387a4ab51b71 SHA-256: ee63dbfa3037ccb2916d569a9acc79fea2564aac68fb96180887d2a3db36b7a0
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8160

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://allytemp.ru/uplcv?utm_term=top+10+pokemon+gba+games+with+mega+evolution
    • http://ggmtc.net/userfiles/files/dovaxebiketatagel.pdf
    • https://mszukam.pl/dat//file/kenipu.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6da180d162---61371525986.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/8b037c279843407a0973a4982f8c2f5d/redijozoruwozokupuk.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da2462ff39---8051459592.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad58ca82d9e---56439041022.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a77a67937d2---xuxawetefegowebiwajitad.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/8d94db69a56270434faf320d16cba809/morixupu.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4fd4af198---4872743949.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609a03d474e76---8762629688.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c06a45346---zofazosasixetexofedixiz.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/d7dec401fd94b42d7eae566593a16d8c/7124265342.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/13d1a98767d71f55b5182fe8bcfb7529/sevemo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec13.bin
4c4e180e25b4a04aec72cebea13a703448c0c32308a7afe59831358609bcd850		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 5636 bytes

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