Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea565fb39196924…

MALICIOUS

PDF

81.6 KB Created: 2021-09-05 22:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 09e3f9285ef8b3f70fa8da34089d72f7 SHA-1: 460248aaea076eeb0437ddaee8eb09533a468c5a SHA-256: eea565fb39196924d851424606db828de14b9fc4f752f3a19b41e6dfcf011a06
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The file contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a likely attempt to lure users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.
  • 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://marketypik.pl/zdjecia/fck/file/4824194091.pdf In PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/fajodubiwebovukefisixesaj.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/36878694107.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/42270686538.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/mipijezodizubalibufure.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/93db666c0d35649482e7cc2d2460c68b/baguwi.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/07r2q5umurg481obtn676c8ldb/76869828802.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/e463a53169d4ee1ac6f9205006778f33/24364943609.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/46485338066.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebe092e2f5---zivelowar.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/motenujogoja.pdfIn PDF document text
    • https://vieclamkinhdoanh247.com/upload/files/58657728404.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210706_5E81A1DAD2838E0A.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/zezot.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/47046250721.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/vomipobavo.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/373b97c276b58b6bb3aeb569bbb686c3/gojimutixawiki.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/74621279266.pdfIn PDF document text
    • https://czus-lukasa.sk/userfiles/file/27924417611.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/19130053236.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/zafebizir.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/89427997991.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809573e0c6f---nifevadavov.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/fapoxilob.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/l1duc3eplkh7b64v95darl3np9/fawipavilodesajalegetetuf.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/77668331450.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=minor+games+in+physical+education+pdfPDF 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_off0000d6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF11 11272 bytes
SHA-256: 0c05be52a1e876eed09e00a6e6d37fe8e982ce1fbb924caae4aa250b99380a86
font_02_sfnt_off00010928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10928 18048 bytes
SHA-256: 3247d37b6c83418d8c8810a7fba1693d602d5dcb18bf1627a523a45850a1eade

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