Malicious PDF — malware analysis report

Static analysis result for SHA-256 80273c2619a7d33d…

MALICIOUS

PDF

69.7 KB Created: 2021-03-16 23:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ff76d694c5212001232e04b2c0b7c510 SHA-1: 9c7a6b7b66d787f28a0aa79694075ba89bebf697 SHA-256: 80273c2619a7d33d534ea0dba615a92c36b428a29a9c0c5e815c6eff3e271fb0
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document employs a social engineering lure, instructing the user to install a browser extension or update to view content, a common tactic for credential theft or malware installation. The document contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=tech+deck+value+guide PDF link annotation
    • http://wugafis.66ghz.com/best_way_to_answer_what_s_up.pdfIn PDF document text
    • http://nujatofu.22web.org/lotus_car_models_2020.pdfIn PDF document text
    • https://zanorima.weebly.com/uploads/1/3/4/6/134624551/9312654.pdfIn PDF document text
    • http://bimiwefumukiv.22web.org/22431279615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_601db11c0b725.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417807/normal_5febdf76a07f8.pdfIn PDF document text
    • https://zazivepug.weebly.com/uploads/1/3/4/3/134359823/7245989.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xugeseza.epizy.com/71742404896.pdfIn PDF document text
    • http://balopatesegefa.rf.gd/are_all_keurig_filters_the_same.pdfIn PDF document text
    • http://wofukisunoxo.epizy.com/keys_to_drawing_by_bert_dodson.pdfIn PDF document text
    • http://bakenexiradofo.epizy.com/95170803602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6364525-0615-4fb9-89a5-369cdb161f6c/dd_gods_of_war.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7addf954-2f6d-4e7b-8256-bb38a4020694/69103297677.pdfIn PDF document text
    • http://vowoxemaxevajo.epizy.com/jotavi.pdfIn PDF document text
    • http://xozelabudizi.epizy.com/65204638594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07237125-cedd-43be-8e32-b725ebaf62e7/61010095216.pdfIn PDF document text
    • http://jowevoxajez.epizy.com/spotify_cracked_apk_offline_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff80413-0413-4d7f-8b84-7198e3c63591/what_are_good_technical_skills_to_put_on_a_resume.pdfIn PDF document text
    • http://fojevas.rf.gd/xefopuzevasifon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df365d5c-ac99-4941-a9bd-1dfc60f8957f/dewalt_cordless_drill_20v_charger.pdfIn PDF document text
    • http://natipezosepe.rf.gd/how_to_reset_binatone_cordless_phone.pdfIn PDF document text
    • http://veroxeron.epizy.com/hp_laserjet_1020_plus_printer_driver_windows_xp.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_off0000d480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD480 5000 bytes
SHA-256: 08f15e8fda90ad24aa7cb356b96f8f3a862f38764a44cd6803c2f304dda3b62f
font_01_sfnt_off0000e589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE589 10680 bytes
SHA-256: 35a9f688ddf2b51d7b93c94e0755a2f4331ebae4eb77f957c7e668f3b03912ac

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