Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee102f41ffe2bad6…

MALICIOUS

PDF

68.6 KB Created: 2021-09-26 18:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8423a73a27d61f96ac7d06f41c59d684 SHA-1: de59842959bdfad23e3d3c470c1823611467ab65 SHA-256: ee102f41ffe2bad6b4513435c150b40a18df2ec959cca1c3abdf56c6c203b603
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised CMS uploads and disposable hosting, forming a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution, as suggested by the 'link farm' heuristic and the presence of URLs that appear to be lures for software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/d9309a48501e43df8fdcfddf0e4c62a7/rorovurekedoxodafega.pdf In PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/3cqnc97qrroq72j6kgu09ccmq4/92954729185.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/99387179972.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/jutukorifagugubezisijoz.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/jeluwawafuwugisomufago.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/lasexukul.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/boduwonozorif.pdfIn PDF document text
    • http://myarrahnu.com/mo_images/files/52484664720.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/13498899369.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/fakito.pdfIn PDF document text
    • http://bluebiz.kr/userData/board/file/24695085422.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/sidudoruzowod.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/56274987186.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380bc86eb51---xotelif.pdfIn PDF document text
    • http://www.ujepites.hu/userfiles/files/fuderubedifekudipedakil.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/dememagibogurubefizetuj.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/vorusofidedejuvuxe.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55573948438.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/zofonevulofozubuxa.pdfIn PDF document text
    • http://pk.mo/userfiles/file/furazokevor.pdfIn PDF document text
    • http://martonelektro.hu/files/file/jovuzip.pdfIn PDF document text
    • http://blueleaves.ru/userfiles/file/10920300848.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/29236398583.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=minecraft+beta+apk+1.16+nether+updatePDF 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_off0000adab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADAB 14920 bytes
SHA-256: 0284fa9ddbb4fa9ba0943b99a8660949a16a64b868199e303a3f2c83cae5012a
font_01_sfnt_off0000d37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB94 10996 bytes
SHA-256: 0c5ee3ed0784948c812a6e954d993ed66e46b9afdc4ea57096fdebba025f5836

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