Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c849492be4df96b…

MALICIOUS

PDF

62.3 KB Created: 2021-09-17 14:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 8ae57e4b8d5add36639089f19a683594 SHA-1: 76e506ab1b0fa835376e9554379ebbf7ff093f51 SHA-256: 5c849492be4df96b4f655b2022246b40bb575139e12406322e1d6ab990ab3622
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6242

Heuristics 4

  • 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.
  • 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://livre-d-art.com/ckfinder/userfiles/files/mujofepep.pdf In PDF document text
    • http://partner-support.net/user_data/userfiles/files/loripufugikimabasupori.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/torotazixuxoponuvepa.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/livilojamujigi.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/kibulaxom.pdfIn PDF document text
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/tazazekiduniga.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/tarerototomuzimuwoluxeku.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/97588028429.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ziropuzomomo.pdfIn PDF document text
    • http://halaljones.com/uploads/files/xolujakozu.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/wekopamu.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/gafujorafoxexerom.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/3ddfvu0pbsuouk5j28u0j1o9f5/pufimenotejekotelusewunir.pdfIn PDF document text
    • http://facyt.com.ar/ckfinder/userfiles/files/mofazadibivojivunanupu.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/dobegev.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/56555797428.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/44074537054.pdfIn PDF document text
    • https://hung168.tw/UserFiles/files/32898845778.pdfIn PDF document text
    • http://reylab.com/userfiles/file/renuk.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/xejibefe.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d21adc5ee0---baxefufefagiburowidemo.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/24177360159.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/12848945568.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/54727439644.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=android+17+in+real+lifePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000baf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF1 16356 bytes
SHA-256: a38e7ad4a82f8bf18a75995334769ec66aa9ff065d8f4d518cbc82c8dc629826
font_01_sfnt_off0000e542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE542 10164 bytes
SHA-256: bdeaed2bff81b2852b5af129190125597b201cb461393222980ab7f9db3743f7