Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f763a8dc0b5f8f…

MALICIOUS

PDF

80.2 KB Created: 2021-09-06 11:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8f86fdfe54694d4ca1b46fd6029b0bc4 SHA-1: 92bd8a82a5d7cdd941e0b73d61a010e0baa36479 SHA-256: 69f763a8dc0b5f8f60c3627120cc689551b9faf513a582cb9027ca9053f91aa3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, embedding numerous URLs that point to compromised websites and disposable hosting. These links are likely intended to lure users into clicking, potentially leading to phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/0c44cac506dda56b5a07cf538a70e0d1/40217018629.pdf In PDF document text
    • http://qa-whg.net/upload/files/kugomavekitopidu.pdfIn PDF document text
    • https://dhesient.com/media/gitesimeraxi.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/76429705763.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/kunuxafetajaniterabitabu.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/23538093523.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202108290658056677.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/wupomonorakalil.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a20eb7302df---20697907069.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/fulufeteb.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/sibogugo.pdfIn PDF document text
    • http://master-br.ru/img/file/gatofadudutalujujuwu.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a21e5cb475---rurugik.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/xonot.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/28023181185.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/bemifuzilopixepe.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/sidovowivizix.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/xizosotumefegomekolexosap.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/91285596961.pdfIn PDF document text
    • http://rotterdampools.com/contents//files/38248974668.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/90563296975.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077d4bb6cef4---milikizaxitepakaboxaxabig.pdfIn PDF document text
    • https://groupunsur2.com/contents//files/90299387975.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/76020496941.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/jibufuwikozorugoriridi.pdfIn PDF document text
    • https://avflash.nl/upload/files/71528850597.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=tales+of+zestiria+strategy+guide+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_off0000d2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EE 18012 bytes
SHA-256: 421841f564d6422b255dd65968ac89c575c8b29e3e9ca5ff26692626b4483a45
font_01_sfnt_off00010258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10258 10808 bytes
SHA-256: ffb30c0946055abf6c668e295e0f4122ff73810cf3ea7041d7a5e5db6f157d74
font_02_sfnt_off00011b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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