Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93389e9ea81ef16…

MALICIOUS

PDF

158.3 KB Created: 2021-06-07 04:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e2234b6bb2df53bcd137c93e2d694db3 SHA-1: c1089e6d87ad7fa81b35b4386383073c4824a229 SHA-256: a93389e9ea81ef160eaf8b1430f2c9960c4330e773390463c89e2d5428932340
124 Risk Score

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 0.8828

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 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://infrive.ru/pbw?utm_term=8.+s%25C4%25B1n%25C4%25B1f+fen+bilimleri+ak%25C4%25B1ll%25C4%25B1+defter+pdf+indir PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465557/normal_6015c4b7c3c2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499002/normal_5fd347f57c3cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_601f99f5cf015.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418791/normal_6008dbf261a62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_5fd6a55940ee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446264/normal_60239ead32622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_60b8f6ca08c2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459035/normal_605bf854428ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f377ee-d566-4046-83c2-3413af61d47a/how_to_know_my_words_per_minute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9032a9b1-61d2-4dbb-8fd6-b76e636234ab/vekoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2d7054-e28d-4f81-80c2-ecbca472c2f8/craftsman_lawn_mower_repair_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e98a5c1d-fcce-4be2-8e39-3debbcd27aeb/jewez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd3647a-74cd-48db-af4c-fa37337d2b3a/83678383415.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/what_does_1231_mean_in_time.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144425892/microsoft_visual_c_2015_redistributable_package_x64_windows_8.1.pdfIn PDF document text
    • http://jebusolole.pbworks.com/f/muqabla_remix_song_mp3_download_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf79ce7-9957-4d7d-85e7-ce935c83c6d3/jolinogewojasunujobemuj.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/f/is_flaxseed_oil_good_to_lose_weight.pdfIn PDF document text
    • http://nebapelamive.pbworks.com/f/order_ged_book_online.pdfIn PDF document text
    • http://fagimox.pbworks.com/f/how_to_configure_logitech_f710.pdfIn PDF document text
    • http://pokatufaxi.pbworks.com/f/berodosinumopadova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbfbaa52-ea94-4cc6-a216-3ce798fdd29b/zederinoxugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da76f48-4a65-4e62-acc1-7f3c8a8c1971/99497519720.pdfIn PDF document text
    • http://namikikis.pbworks.com/f/what_is_auto_reply_message_in_whatsapp.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/w/file/fetch/144458130/begen_i_a_toplam.pdfIn PDF document text
    • http://lakejidumap.pbworks.com/w/file/fetch/144702897/modelo_de_recibo_de_alquiler_de_vivienda_para_imprimir.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25C74 5232 bytes
SHA-256: 59239a12d099ad4ec9c6772b5728eb234449d1f383c8903e3aca0f1ed3726b30
font_01_sfnt_off00026e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26E09 3844 bytes
SHA-256: bbe094e24df26b398ffedca31c73145d95037acc365b52358a9667c52f57af2c