Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f9e9bddf8b2ab5b…

MALICIOUS

PDF

76.6 KB Created: 2021-03-09 03:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6066fb81dfec58f7bfb0d2ee6d27e5fc SHA-1: 37d8b89e32eac1acfccc34b0fb01cd7df9d345d8 SHA-256: 2f9e9bddf8b2ab5ba0ae177b145710db27e2e2339ac17b06a1664006fc367c38
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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 0.9997

Heuristics 6

  • 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.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://botokaw.ru/award?keyword=common+idioms+for+ielts+speaking+pdf PDF link annotation
    • http://bukobaxaz.getenjoyment.net/fisidugi.pdfIn PDF document text
    • http://itawegan.fun/white_pencil_christmas_tree_7ftvs4oj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_604660214ac9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470833/normal_5fdc0be893bbc.pdfIn PDF document text
    • http://raffle.website/brothers_movie_ringtone_pagalworldr0v95.pdfIn PDF document text
    • http://save50it.pro/metformina_500_mg_para_ovarios_poliquisticoswfp7m.pdfIn PDF document text
    • http://peskomment.ru/fapotinesetowl4k8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450338/normal_6034fb10da54c.pdfIn PDF document text
    • http://yogist.fun/led_zeppelin_no_quarter_chordsux62o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415308/normal_6046b3ecd5198.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/63267842230.pdfIn PDF document text
    • http://alteramaks.world/what_is_ticker_symbol_for_sp_500qbd7u.pdfIn PDF document text
    • http://vofufime.mypressonline.com/topurevipokofegosupige.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/sherlock_holmes_story.pdfIn PDF document text
    • http://socialwave.me/10040526499pl5a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411219/normal_5fd2d33965af3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zevesijuduma.atwebpages.com/seadoo_service_manual_free_download.pdfIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_77f7ee5d5a184792a48bd21559716b74.pdf?index=trueIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_4629e5525b8442fdb8f4f407d91e4029.pdf?index=trueIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_2eab7f3551f14d6da4ee8f390f342caa.pdf?index=trueIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_2515f9ce0d1e457e8a501d7b5eee1607.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000eed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 5328 bytes
SHA-256: 2f2904e6ccabc2e5723c35095c6432ce02628fe5a7998f0c798160d73829c4cf
font_01_sfnt_off000100de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DE 10732 bytes
SHA-256: 37e6b761620c81e1102a45e0db25b8bfd7eaf6d3ba3ee6f4520c4d1947aadefc

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