Malicious PDF — malware analysis report

Static analysis result for SHA-256 91878a049a8989a6…

MALICIOUS

PDF

91.3 KB Created: 2021-06-14 01:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e4702e37810d571e4d2efd6e0de272d7 SHA-1: fb6b88717c2ed402f97bb8fd43d38c6347884a72 SHA-256: 91878a049a8989a6d5197ae26dfd7871bdd4916d2f03ed9e82128e197b1cccbe
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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 0.7408

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://cructi.ru/pbw?utm_term=mission+impossible+1+subtitles PDF link annotation
    • https://wedegamev.weebly.com/uploads/1/3/4/3/134305253/keverad.pdfIn PDF document text
    • https://dubamuxurel.weebly.com/uploads/1/3/4/4/134463085/62eb593f696623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_60b9e0591f7e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488556/normal_6055234553eef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_6031882c874f6.pdfIn PDF document text
    • https://vebexedupatad.weebly.com/uploads/1/3/2/7/132740253/1143567.pdfIn PDF document text
    • https://panelaxefejavej.weebly.com/uploads/1/3/5/3/135306159/a094e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_6025627e937f8.pdfIn PDF document text
    • https://nunosutelakib.weebly.com/uploads/1/3/1/3/131383720/devokamofewesol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://popuwepux.pbworks.com/w/file/fetch/144619299/72601342942.pdfIn PDF document text
    • http://luwivaj.pbworks.com/w/file/fetch/144490893/35192323791.pdfIn PDF document text
    • http://vosebim.pbworks.com/f/36424439469.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/w/file/fetch/145251855/premium_adfree_apk_for_videoder.pdfIn PDF document text
    • http://kesowununak.pbworks.com/w/file/fetch/144833412/dosificacion_de_contenidos_para_quinto_grado_de_primaria.pdfIn PDF document text
    • http://magogopowo.pbworks.com/f/53866395263.pdfIn PDF document text
    • http://pafesudive.pbworks.com/f/lookup_phone_number_free_reddit.pdfIn PDF document text
    • http://vonodatob.pbworks.com/f/gigafofuzafojitinuropiwet.pdfIn PDF document text
    • http://zofurutatag.pbworks.com/f/shootout_at_wadala_full_movie_watch.pdfIn PDF document text
    • http://faxofapuf.pbworks.com/w/file/fetch/144802680/how_to_play_pubg_on_android_with_ps4_controller.pdfIn PDF document text
    • http://garewewaziwu.pbworks.com/w/file/fetch/144538215/holt_spanish_1_workbook_answer_chapter_5.pdfIn PDF document text
    • http://rawumadakora.pbworks.com/f/unblocked_hentai_games.pdfIn PDF document text
    • http://wodotazisib.pbworks.com/w/file/fetch/144751746/how_to_get_eagle_bearer_division_2.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 15740 bytes
SHA-256: f5d4ae8554cba23b8c113ef0332b17573c96fe6292bcb4bdc4e66f75a0a276d3
font_01_sfnt_off00011b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9F 4856 bytes
SHA-256: 77403bf02776f3fb0e6c41da9ff62d32fdd09d65bce4797bd8648092fa187dc6
font_02_sfnt_off00012c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1D 7728 bytes
SHA-256: b86042343fd76d5c1449d9078e15590d55a5ecf432a1d6ddc156b36057ae38c5
font_03_sfnt_off00014573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14573 15864 bytes
SHA-256: 3f5365a2f93460af844c05e4960cea4425965202673bd1547c43fb4cd77ad5fe

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