Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c48373a98ca4c4…

MALICIOUS

PDF

196.4 KB Created: 2021-02-12 10:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bc717d5cd7f484ab90ac6d646e8985c6 SHA-1: 2ae4f8bd0beb4f49c6445830cf5d0cf506b553b2 SHA-256: 18c48373a98ca4c43cd5ce4433d3b1f66defd2928c4a3fcc82a46a48b0eb5003
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URI pointing to a suspicious domain, identified as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to an 'evolution skills worksheet', likely intended to trick users into visiting the malicious URL. No scripts were extracted, but the presence of external URIs and the ML/ClamAV detections strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=theory+of+evolution+skills+worksheet PDF link annotation
    • http://giveaway2020.info/47014386180oecwo.pdfIn PDF document text
    • https://pudabesipewoz.weebly.com/uploads/1/3/0/9/130969441/75504bdef1d.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/masks_powered_by_the_apocalypsep1h5u.pdfIn PDF document text
    • http://wazasutosas.iblogger.org/iksar_monk_leveling_guide_p1999.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/aa6b3dc7.pdfIn PDF document text
    • http://wukosuwusa.iblogger.org/photo_to_cartoon_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/54rRfqX/formula_1_racing_games_for_android.pdfIn PDF document text
    • http://persequen.com/361718698642pk6y.pdfIn PDF document text
    • http://hiziryigit.online/zelda_twilight_princess_dolphin_down3uh3p.pdfIn PDF document text
    • http://badgesverified.com/78930282632cg55r.pdfIn PDF document text
    • http://soldatskaya6.ru/tabla_de_cambio_de_libras_a_kilosdx591.pdfIn PDF document text
    • http://lightly.store/yahoo_messenger_old_version_for_androids5oeo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dufexisoji.rf.gd/30112194361.pdfIn PDF document text
    • http://mirimanomuropa.rf.gd/43453664345.pdfIn PDF document text
    • http://xaligapuk.epizy.com/raxomisedusewodevib.pdfIn PDF document text
    • http://wevikokuzufos.epizy.com/napakotopupulatot.pdfIn PDF document text
    • http://bejutamukedus.epizy.com/facebook_social_network.pdfIn PDF document text
    • http://simipibenafar.epizy.com/chandramukhi_tamil_songs_starmusiq.pdfIn PDF document text
    • http://bedisil.epizy.com/have_late_payments_on_my_credit_report.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0E9 2940 bytes
SHA-256: 72b815926571ed76dcdb15ba0f925f8be737f518649be50e3ea36e0fc125b231
font_01_sfnt_off0002cb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB75 4912 bytes
SHA-256: 0b5850e12b334f7195ff6540272b96481a53022ccac19b95b1a1eeccba013ecf
font_02_sfnt_off0002dc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC44 11288 bytes
SHA-256: b1ffe8c7a764e379dc89461b5dd96db38d0b8cbb55a0c03be4ac8e8a4b9403de

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