Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26da69cf923491a…

MALICIOUS

PDF

70.1 KB Created: 2021-03-10 07:17:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 198fc48276a8eac613502b0fc50443c6 SHA-1: 1594972be98899b1f9986caf903c9b9130275695 SHA-256: c26da69cf923491ad733d747e5a5ede09c9598c16c0dcf546affcf639fcebb8c
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-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
  • 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://jottigo.ru/123?utm_term=classification+of+living+things+worksheet+ks2 PDF link annotation
    • http://letgtma.bid/download_steam_for_windows_10_offline_installer3j0dd.pdfIn PDF document text
    • http://rivalo130.com/bifinakokovusiriwegpnmaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_6016432cf1c1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492281/normal_5fd78963c2bd9.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/latajevanomavixaselipikal.pdfIn PDF document text
    • http://goodsun.space/anthony_de_mello_the_way_to_love_deutsch9skok.pdfIn PDF document text
    • http://miravozexafoxiw.iblogger.org/vazes.pdfIn PDF document text
    • http://snapchat-alert.com/355592519553ccpp.pdfIn PDF document text
    • http://jumbochecker.com/tajodidojunebonu07sqj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376610/normal_5ffe63823efca.pdfIn PDF document text
    • http://maska-respirator.shop/punowevevewfeyxw.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/samiwofibizujapurezoduk.pdfIn PDF document text
    • http://kugaraginoja.mypressonline.com/is_rainbow_6_siege_on_ps5.pdfIn PDF document text
    • http://gugolufixa.mywebcommunity.org/procreate_app_for_windows_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_6040baf0686cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423728/normal_60074e31e3f57.pdfIn PDF document text
    • http://lollipopa.online/se_trata_la_iliada_y_la_odisea7lqg3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vapojolojumow.rf.gd/dinanevefaxi.pdfIn PDF document text
    • http://dusipesubabaf.rf.gd/44141352807.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/zowotinuv.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/is_there_going_to_be_a_sequel_to_american_assassin.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_off0000d730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD730 5396 bytes
SHA-256: 5062fd6d40c3cd4a6d0805de1062889e9e0a3a14cd5cf7070be99376b2d5ba99
font_01_sfnt_off0000e99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99B 9676 bytes
SHA-256: e99095898789ace7cb20d803f7dface464f7be3df1647c1d40e7ed4446fae915

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