Malicious PDF — malware analysis report

Static analysis result for SHA-256 772a5d94c0882d5d…

MALICIOUS

PDF

79.3 KB Created: 2021-09-08 18:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fd59ab7dbf317b45fac168c237c87069 SHA-1: a1b26a44a62567da4e5cd3479d2eeceb5244a799 SHA-256: 772a5d94c0882d5d788267e5b369974e3617a5b01343e9991f87791605f887de
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious content or download further payloads. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing malware. The presence of embedded JS points to T1059.007, and the overall nature of the file as a potentially delivered attachment aligns with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://pixomot.ru/uplcv?utm_term=chicago+electric+mig+180+wire+feed+welder+manual PDF link annotation
    • https://path.mn/userfiles/files/58163343088.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68525017992.pdfIn PDF document text
    • https://sabresources.com/FCKuploads/file/27887526519.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/15323754513.pdfIn PDF document text
    • http://xn--80aafkatcapceshpicpg3h.xn--p1ai/pict/file/26599492192.pdfIn PDF document text
    • http://learningkey.org/userfiles/kikugegobolerixirebimus.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/42731321095.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210903222609.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210902_125734_3735.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/11532494024.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/zebasaf.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/dubunonogevavojopajuvuf.pdfIn PDF document text
    • http://beverly.kopanramen.com/uploads/files/92466737052.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/meximaborozaponupo.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/5355522596.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/wutokedulamug.pdfIn PDF document text
    • http://torby.kbo.pl/ckfinder/userfiles/files/75366207790.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/34131303642.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132aaea349da---xoxutigilalogazedaxejef.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/18519613503.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/43295213262.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/80676402427.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/degudisebevesagovud.pdfIn PDF document text
    • http://thaoduoconline.com/userfiles/image/file/pizila.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_off0000d134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD134 11356 bytes
SHA-256: 9d26ff72b7af41edfb82ec52678091d0e1872a31eaf68e81daabd640e6e9c850
font_01_sfnt_off0000ebb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB5 17024 bytes
SHA-256: a47e40ef1e2b2e7001d97b444403454650400fc6bf84fad32a899900dd4b57f5
font_02_sfnt_off00011793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11793 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1