Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc275391c2801da4…

MALICIOUS

PDF

75.4 KB Created: 2021-03-01 01:57:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 19c4661a0e5b4cbf6f9b1e8da85a5dc0 SHA-1: c863da747b5ad136eccaf973d4d5be9f2ea6caef SHA-256: bc275391c2801da4b779e5e639e6ac220d165c40ea2b00f9d9d277ad4d28fb54
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 0.8556

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://pelibifir.ru/aws?utm_term=what+is+norse+gods PDF link annotation
    • http://winoxolupuvil.getenjoyment.net/recetas_de_cocina_para_el_ayuno_de_daniel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449397/normal_602a4fa8793db.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/viva_el_toro_book_chapter_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390660/normal_5fddbac25aa2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493589/normal_5fdef09b35e45.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/47932789780.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/zimaredisuwege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_601a9c179b5b7.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/how_many_red_fives_are_there_in_a_deck_of_52_cards.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/dungeons_and_dragons_modules_for_beginners.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/61937782972.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F86 5068 bytes
SHA-256: d8cf89734ba3d43d82158aa19ac39ecbde803ba97e9b360360c3a9158d38a64f

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