Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfab4bf82f609c3f…

MALICIOUS

PDF

62.7 KB Created: 2021-03-02 01:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7ad9e55611ed6465a66088a76f3c8332 SHA-1: 7785c53175dffd75500f9c0a3e043f304ac3a19e SHA-256: cfab4bf82f609c3fa477f4464be96aa1874538015a49bf0c24a6512524ea0271
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. One of the primary external URIs, https://xezojetit.ru/award?keyword=daily+grammar+practice+7th+grade+free, is likely a lure to download a secondary payload. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9722

Heuristics 4

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xezojetit.ru/award?keyword=daily+grammar+practice+7th+grade+free PDF link annotation
    • https://dunudafulu.weebly.com/uploads/1/3/1/0/131071166/pixarevefavo.pdfIn PDF document text
    • https://natapoja.weebly.com/uploads/1/3/0/8/130813782/9499244.pdfIn PDF document text
    • https://sibomidejuxeda.weebly.com/uploads/1/3/4/5/134599986/4536297.pdfIn PDF document text
    • http://sentytld.online/beko_washing_machine_6kg_1000rpm_manualvegrh.pdfIn PDF document text
    • http://callipakk2.site/mathematical_statistics_with_applications_john_e_freundy4qhi.pdfIn PDF document text
    • http://opt05.ru/9861603246209c2p.pdfIn PDF document text
    • https://gekaketiba.weebly.com/uploads/1/3/1/4/131455198/a1c19b.pdfIn PDF document text
    • https://lefaxujil.weebly.com/uploads/1/3/0/7/130739779/gakabepun-bezip-posovex.pdfIn PDF document text
    • http://telgrm.site/forigivavugulnglx9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuzuruwevirelu.rf.gd/78516815416.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/baldi_s_basics_mod_apk_anti_impossible.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/funny_questions_and_answers_about_animals.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/57041811497.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/2016_voodoo_hoodoo_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/13124981522.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/civilization_4_multiplayer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/usb_bootable_software_free_for_mac.pdfIn PDF document text
    • http://durevitulo.rf.gd/chloramphenicol_eye_drops_information_leaflet.pdfIn PDF document text
    • http://kujafugakare.epizy.com/autodafe_drum_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/domagexu.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/time_management_tips_for_students_reddit.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC81 5572 bytes
SHA-256: 24efa452359f8ef7847742f424896ccf5dbb6ccddd4170cdd46fe69a6e2464dd

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