Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa15edfbac7eabd2…

MALICIOUS

PDF

66.8 KB Created: 2021-06-12 19:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 56ae3849281eeb230bcb050eaff52a5d SHA-1: 76300579b9cfd3e30d875acf0ce94d0724297046 SHA-256: aa15edfbac7eabd2d83a4c15a6b20c8f2b67289b11872415f189e2e27b245445
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, directing users to download further malicious content from compromised WordPress sites, disguised as search results for movie downloads. The presence of multiple URLs pointing to potentially compromised CMS upload directories suggests a coordinated effort to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8377

Heuristics 5

  • 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
  • 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=love+sonia+full+movie+download+mp4 PDF link annotation
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/018030d22618f9a0f23cd4f1110f6aea/zinenalovojime.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/2edc946df7f6ad53cfa90b9b1520b0df/21455287242.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/jexudovugimirur.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094906d3b392---4191979923.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/9e0954a6ad93ef396ace5a4eb8d4eca8/fugit.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9f627ca95---jadokuwewajogeg.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/xanenolowolugeti.pdfIn PDF document text
    • http://asustainable.com/global/file/82884677857.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607812c8701d3---49727468829.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/tujagatize.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16076358c58ca6---lagoxujogefuzuderibegep.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/427d8e88e3dc61286671f2c21f9dfc41/93737279555.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a8db0db2---63079255385.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef460644df---dewabotojevijofotogoturid.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a5bf46997---bisedogeku.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_off0000f215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 5272 bytes
SHA-256: 861d799786c81b01fd940be22f16a114b2e99ab4143d1f38e7b23ce632b588a7

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