Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c812e17864174a…

MALICIOUS

PDF

78.4 KB Created: 2021-03-08 05:22:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 20eebce344a8b14526c2f3aea0348dc2 SHA-1: 18c178d9486de7b77c74de095a13bf148ad179d1 SHA-256: b5c812e17864174a29150b9e20f8fd720aa82129e381e57dfe0cc89fa7b8df10
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/strik?utm_term=eragon+movie+download+in+hindi+filmywap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379483/normal_60219a659ec63.pdfIn PDF document text
    • http://frukt.fun/journal_number_3_gravity_fallss0qtu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_6026656c13dab.pdfIn PDF document text
    • https://cdn.sqhk.co/wobimore/fjbCjbo/elements_massage_scottsdale_road.pdfIn PDF document text
    • http://stavki.link/the_catapult_2_mod_apk_terbaru8mwcj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_602ec2f21dc63.pdfIn PDF document text
    • https://cdn.sqhk.co/nusideja/aq9sljg/wifi_software_windows_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449968/normal_5fc852d746cc4.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/aldehyde_allgemeine_summenformelcze46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416928/normal_5feb338792dc9.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/n9zjjhi/20273552467.pdfIn PDF document text
    • http://befigter.xyz/raxatixenukotedeledumh4ts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425487/normal_5fe9ef38134d1.pdfIn PDF document text
    • http://easylearning.space/nba_g_league_scheduleaof9o.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/jdjeUjg/7707541363.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoroxur/hfgeHuO/zunudobudefugome.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/assamese_movie_kanchenjunga.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/63706840746.pdfIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_d5be5aa038f34e8399a421ab2fc8a81b.pdf?index=trueIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_0b505517ede9497cb1a58e6d97565e27.pdf?index=trueIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_aca068ce73e745438792cf7b8caea334.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/domirovugile.pdfIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_f2bbba22a8e446d1b6416fad57ef4527.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/whatsapp_app_for_android_phone_2018.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DD 5488 bytes
SHA-256: d46edd5cf49c60b400eeb7d399a10b9b7e8a1544e7946dc8cdc727ac12d3f0dc
font_01_sfnt_off0001087e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087E 10268 bytes
SHA-256: 399f0763d13e6cfb66d6f96e33ffdc0e2caa744b5248760e7b999fe573449ee3

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