Malicious PDF — malware analysis report

Static analysis result for SHA-256 80543966753863a9…

MALICIOUS

PDF

92.6 KB Created: 2021-09-08 20:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e2bd4e9beb71772c6986ae356d969679 SHA-1: 6ada8bcf264d2f41eda7a0a41186bf2dc9abb27d SHA-256: 80543966753863a91cf8a1b3f0f146a4200c4e6c47b81d8b2b0d28312df97b27
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • 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 http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90508211443.pdf In PDF document text
    • https://blv.by/upload/editor/files/94998789303.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/74273233442.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/3040529260.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/22694047449.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/35754686244.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/16078848677.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/20521971927.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/da621833f366b153caee8ad289fed2ff/kekizebesi.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/xabusezowoxegan.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/e7366531cd8433282214e6b68969f7b1/58356327771.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5c69c0043---64415313251.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/pebinamatebasalekejegav.pdfIn PDF document text
    • https://keiba-like.biz/js/ckfinder/userfiles/files/dovikiwev.pdfIn PDF document text
    • http://idroter.org/userfiles/files/nefazamajinewomapididawow.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/jixutodokurat.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/85855100999.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/1450768000.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/lisidaba.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/rider.pdfIn PDF document text
    • http://selmanoglusigorta.com/userfiles/file/17661076431.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/18578548132.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=consumer+rights+act+2015+uk+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_off00010513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 17140 bytes
SHA-256: 6ad21aa4ad8242afc04a274aeef953ab0096656bb7b3986fc1c14a49b662a744
font_01_sfnt_off0001317f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14996 11672 bytes
SHA-256: e8f020eb34cf5a804c43fb2f2a0f8494cec34afa37627f45d1bc75b758de7ddb

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