Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0fdae924a4fc40…

MALICIOUS

PDF

83.4 KB Created: 2021-03-23 02:31:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1926ca068ebf7cf65330c8afabedd710 SHA-1: 17f0f601724de8052ddbe331b1b90e436cefd00a SHA-256: de0fdae924a4fc4042439825a87541bc7d1fda0c62744aa483c90a86d2d7293a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

Heuristics 5

  • 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
  • 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://nipisod.ru/wix?keyword=ninja+turtles+legends+mod+apk+happymod PDF link annotation
    • http://p-kavkaza.ru/815574843421nhh4.pdfIn PDF document text
    • http://discovljzg.fun/616582659692bx8c.pdfIn PDF document text
    • http://twoup-viktoria.online/remstar_pro_m_series_humidifier_light_flashing7adlu.pdfIn PDF document text
    • http://pojokup.getenjoyment.net/zitedavijesiwexobedo.pdfIn PDF document text
    • http://nasty666.space/85919358564k58u.pdfIn PDF document text
    • http://lightsex.ru/99718866800q1yj.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/66238489042.pdfIn PDF document text
    • http://reliables.ru/31221714297yccao.pdfIn PDF document text
    • https://cdn.sqhk.co/senaveduwiz/8Qghih2/momoxukovilokusuxigikisos.pdfIn PDF document text
    • http://pitushok.fun/sowegopejaguxemepemefijbz0a.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/hgNUjj4/6278084536.pdfIn PDF document text
    • http://midunetojonawiw.mywebcommunity.org/30578753176.pdfIn PDF document text
    • http://halfraire.xyz/possessive_nouns_worksheets_5th_grade1xfau.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/dhb0dzY/learn_to_draw_anime_step_by_step.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_7e85a3e1867746f59026bf7834bdffdc.pdf?index=trueIn PDF document text
    • http://xutenujute.myartsonline.com/jump_force_character_pass_2.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/tcp_ip_network_layer_functions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a60a50f-e423-41a9-af67-667e20a839b8/72030924979.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_83b78c68687142b09e8925939d63fbf6.pdf?index=trueIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_140b72ad2b6a40ff9dea7b106ae7d55c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebfc9411-c30a-4019-94ba-2129ef68581d/laars_lite_2_pool_heater_troubleshooting.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D2 3836 bytes
SHA-256: 8292b84528f7dce31cade9632c10751f413873caf0d644f904795dfc9534f67c
font_01_sfnt_off00010397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10397 5584 bytes
SHA-256: 1a004514c7b91080b17857a192a9e40804d3096ff27202b011fdeedb06a113cd
font_02_sfnt_off0001167a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167A 12520 bytes
SHA-256: 50c419a2f93750892bae9265b774c921277a1d0602ce66850b64f71f383762ae

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