Malicious PDF — malware analysis report

Static analysis result for SHA-256 370eb0ed47d604ea…

MALICIOUS

PDF

92.8 KB Created: 2021-09-21 06:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7d9e7d8b99c57e207f4997f07f65eabe SHA-1: f816fe97681fab89eedc0d16a1181c4cd718b7c7 SHA-256: 370eb0ed47d604eaf1996f803cf5ce43776371e086134e376213fdcf4c88494a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://allytemp.ru/uplcv?utm_term=play+online+3d+games+for+android PDF link annotation
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161491d7aba412---90723825910.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/32430121541.pdfIn PDF document text
    • http://sun-dr.com/uploads/files/202109051019187757.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161303ba04ed6c---nujit.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/77396421427.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/69242568864.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/rital.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/dalex.pdfIn PDF document text
    • http://euro-ex.net/images/blog/file/36089046499.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/24619770538.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/kowenub.pdfIn PDF document text
    • http://gartenstadt-apotheke.com/userfiles/file/39923067559.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40099976585.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/50508290224.pdfIn PDF document text
    • https://blv.by/upload/editor/files/rizosojisifegogoda.pdfIn PDF document text
    • http://slavutich-media.ru/userfiles/file/93749496209.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/xizofojabifafiwapiw.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/bozavidapopisosis.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613260429f4e2---depapan.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/vepikake.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/42819605101.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/matebalamuzasu.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/48191526331.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/kelosijoxumij.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/pigam.pdfIn PDF document text
    • 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_off00010761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10761 17464 bytes
SHA-256: 3a0499eadd4f083060cdd48c415efd90361ce5533a5bbcb46f28ffcfe96b9806
font_01_sfnt_off00013475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13475 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C8C 10884 bytes
SHA-256: 0711648e4d72075d1c6124e48605d6c6e742d248e42ea3e848bfc52489c854be

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