Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be9c682928d7b4a…

MALICIOUS

PDF

75.3 KB Created: 2021-02-19 20:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: be9645c5d9833bf2c923717e8004464f SHA-1: 95d7f37449aa56d2ffc14b08a4b18d32bb208d5a SHA-256: 0be9c682928d7b4acb54a875e1d4cfa4f27e7438e45053c468c97a8bc5778a6c
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 0.9997

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://crophysi.ru/strik?utm_term=what+does+grantee+name+mean PDF link annotation
    • https://cdn.sqhk.co/vafodagusun/5NPhhBz/love_and_respect_workbook_download.pdfIn PDF document text
    • http://vexidizagopukib.22web.org/90133057615.pdfIn PDF document text
    • https://zolowokixo.weebly.com/uploads/1/3/0/7/130738875/3085183.pdfIn PDF document text
    • https://cdn.sqhk.co/loxexafetivu/hgehcjj/hide_and_seek_movie_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/legezuseg/ggjlib1/fashion_story_cheats_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389108/normal_5ff501a213981.pdfIn PDF document text
    • http://xeboxemovev.66ghz.com/exercicios_resolvidos_sobre_capacitores.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478928/normal_602b851375b4a.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/dxCbjbC/download_aether_portal_mod_for_minecraft_pe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403422/normal_5fe921413fe89.pdfIn PDF document text
    • https://lupabarudu.weebly.com/uploads/1/3/1/3/131398308/3363305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_5fe696e077923.pdfIn PDF document text
    • http://xugafigipi.22web.org/zabivituzoruke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fomabobas.epizy.com/app_game_booster_apk.pdfIn PDF document text
    • http://jafexobaxe.epizy.com/lakafo.pdfIn PDF document text
    • http://gadunekubajip.rf.gd/lubizenisokunukufipi.pdfIn PDF document text
    • http://sazojojuw.rf.gd/brainbread_2_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/ielts_liz_writing_answer_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/break_even_point_formelsammlung.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/android_phone_network_settings_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/71075017285.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E7 5220 bytes
SHA-256: 279d988c983f8471c3d3ff7718c7200842ec2e725b8a882e6e48f60753b636e2
font_01_sfnt_off0000f789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF789 12876 bytes
SHA-256: e5b62a91f0f5692f5469155b94e7febd98530c761160927de35ee87b21572832

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