Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be00ebddfe74edd…

MALICIOUS

PDF

70.6 KB Created: 2021-09-26 07:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7c776735ca569d5e6d1bea85c75d654c SHA-1: d0f1c8c1d0eefcb587ace0170a3c1b71d060fac5 SHA-256: 9be00ebddfe74eddb8b113736b78d07cff98ec632f83782027eb2fb9f8f40cfe
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Several heuristics point to the document functioning as a link farm, directing users to various external URLs, some hosted on potentially compromised or disposable domains. The presence of numerous unknown URLs suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://mobspace.xyz/web/img/podborky/files/14410068318.pdf In PDF document text
    • http://babyindex.nl/images/uploads/velimuxefeb.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/mabukuvumoxijoxodelini.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/46620767003.pdfIn PDF document text
    • https://escritacontabilidade.net/fotos/news/file/3094381437.pdfIn PDF document text
    • http://linker-apps.com/files/rulofozazamonokamijopo.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/79560744150.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/wotumusikuwatoto.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/v4hup5kl02f3q009frnplmmjfv/3184918433.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/nojotoxitixikodeguvepu.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/tilepenupoboxitabujuleg.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/lukemutureruvokag.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/xolutuxure.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/kutogevarit.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/natusitoxibuwiwusigos.pdfIn PDF document text
    • https://tiemhoamo.tiemhoahaibara.com/data/dulieu/files/59956467001.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/betigejuxavafolufe.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/wuzilurorojomogalaw.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/48223546952.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/giguxeb.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/10006804638.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614833151cf86---kitelegewexomozagabijip.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/09787fdc97c7adc2d99e6af24035fc28/wisumixarazopuwisivikibab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=command+and+conquer+n64+romPDF 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_off0000b24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB24A 15924 bytes
SHA-256: 8bc7cff986424ad221e57961962dd261fcd0659862d92bce15b5b7d80045f80b
font_01_sfnt_off0000daa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 10648 bytes
SHA-256: 9312d139d9fe3ce2ca6b74df117b58f9b5ec98912138c1196656933b7dffe914
font_02_sfnt_off0000f2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1