Malicious PDF — malware analysis report

Static analysis result for SHA-256 6339ab87849b14d9…

MALICIOUS

PDF

70.5 KB Created: 2021-03-15 21:33:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 15b5518d8b822b45092d76ada437a12c SHA-1: 9c6a6a6853fa37529c4e8cbebbec5c9de830f343 SHA-256: 6339ab87849b14d97275a471bab7830506878cf0dadc2854d47820689ecc2e24
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 0.9998

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://midufefew.ru/wix?keyword=sight+word+we+worksheet+pdf PDF link annotation
    • http://mazejofeg.mygamesonline.org/622712658.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/gas_turbine_vs_internal_combustion_engine_efficiency.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/pathoma_2018_google_drive.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/djejIZg/duxepizumokefunuvivel.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/26814317816.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/cJYgjge/64274389137.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/H4shgjf/forest_siren_head_survival_island_mod_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6b95a0-1e18-4901-b93c-c708293d9469/sovasajixixuxojefe.pdfIn PDF document text
    • http://xezexudal.epizy.com/past_perfect_tense_exercise_with_answers.pdfIn PDF document text
    • http://nunitew.rf.gd/72321712820.pdfIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_1325e75f077c4a71bcf04d47be6bd800.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/040fe806-e9c4-4fea-afed-0f7ecda1ba12/jurumepekafenuxote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86788920-67c9-41de-af25-6d8e5315efb4/how_to_factory_reset_yamaha_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35bdbb48-9cfe-4e91-b4d1-1e1b12402f47/lujatobexirelid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc092e0-730d-4628-91bb-0993b9409da3/what_is_a_holy_quran.pdfIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_8664c685138443ad93dc54c6c9264f9d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19fccaf-c670-45d0-8947-683785a3d6c5/vitamaster_1700_treadmill_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c9c6fd-a4ac-407d-ae14-b1f0c2a3f660/98382117104.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 5

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_off0000d36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36D 5320 bytes
SHA-256: b08a9918553d15c407e0d72a485bd6fa89ea71ef51830722dda1aacd8b6db6d8
font_01_sfnt_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 11160 bytes
SHA-256: aa1b985d4ceaa4c8a3ed5a3343d2c9b9c0ef51a0a531debc7bb14a542b25e322

Open this report in the interactive analyzer, or submit your own file for analysis.