Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f142ee5100765f…

MALICIOUS

PDF

71.2 KB Created: 2021-09-30 13:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ccec3c24070cc161bf7c5b1813831d42 SHA-1: c757d69ee560a06b43e162753125482cad58fc18 SHA-256: d0f142ee5100765f62c6e3a51f148733b31249671bfd31b857f6736a9654086c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of links, many pointing to potentially disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://ibarugi.com/fckeditor/userfiles/file/paronufofunubim.pdf In PDF document text
    • http://8njl.com/userfiles/files/xinikebawexojawobetededux.pdfIn PDF document text
    • https://www.fishhabitatnetwork.com.au/application/third_party/ckfinder/userfiles/files/22898682357.pdfIn PDF document text
    • http://sparkpro.lv/content/file/45986300817.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/10882440486.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/dugitazofeviginubipuf.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/11766908355.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/54457666605.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/035ef8057da80b9c97b0c268e1e393ba/gozanulobaputajuza.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/99741328348.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd60b4ec0c---ritazikomo.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/lisofalu.pdfIn PDF document text
    • http://ivankrivanek.com/userfiles/file/84627016273.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/11185377790.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/vituzanav.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/begukinebebawadi.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/gabexokozoxegajuj.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/41079578111.pdfIn PDF document text
    • https://taperagi.com/contents/files/21867201888.pdfIn PDF document text
    • http://www.como-grup.ro/fisiere/file/roxejisipaniwi.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/e3cdfd9d9e9defcfc3f266bef4da5ee0/junamenoxujomadogusutesa.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/bunomisipaguzikek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+do+i+transfer+my+pictures+from+my+phone+to+my+tabletPDF 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_off0000b1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D8 16748 bytes
SHA-256: d701055f283dc36d59b37b6e9e6729e2bfd5f9d42c2f021fce9cf8697fef2770
font_01_sfnt_off0000dc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF437 11316 bytes
SHA-256: e464c2c677359d0eabe961f971c2ce2152072ea30a787532d00810471f4f05ab

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