Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6106fc2b2184f8…

MALICIOUS

PDF

73.7 KB Created: 2021-09-21 13:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 60e5d3541e4cf9e3d51ba53068389807 SHA-1: 3fef6323383cef675d4a559ef7c5758e162e4c81 SHA-256: 3e6106fc2b2184f8b04ca4b6cc053c32e78e16d3c842ecd8803fd7a4d7ae8b38
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://morecoredesign.com/images/imageUps/files/49033958866.pdf In PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/gufosuxawake.pdfIn PDF document text
    • http://apothepharma.com/upload/files/29723186784.pdfIn PDF document text
    • https://milorem-service.ru/userfiles/file/30624151057.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/1fentprcdehnjr6t4jvqohrfd7/33172213553.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ba4185b3e---62958532200.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/14144080242.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/9708662738.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/51048985011.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/83274204576.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/60973715590.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/kuwag.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/18562099928.pdfIn PDF document text
    • http://ornito-silesia.eu/userfiles/file/6239989811.pdfIn PDF document text
    • http://www.siposferenc.hu/html/90897936078.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/ragomebesonozowezid.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/56903547115.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/37246128189.pdfIn PDF document text
    • https://stvorki.ru/files/file/ximorimebovegozekiz.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a388b1896a383c25eebb34b4f3b22c4e/19153030972.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/nubeje.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/22688721874.pdfIn PDF document text
    • https://panama4d.com/contents/files/fomojunen.pdfIn PDF document text
    • http://rc-saty.cz/gais/image/file/gerumuwixawer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=animal+farm+as+an+allegory+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_off0000bc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 10836 bytes
SHA-256: 019e4c546da06656b5ff33084915e8e951da7051c9ee509ca5999aadeb81a7fc
font_02_sfnt_off0000ed6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6F 16880 bytes
SHA-256: edabc11a626f56838bb3fe5ae12d6503a4500f382675903132bfd7c23f765678