Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28c76ad749e1a36…

MALICIOUS

PDF

76.8 KB Created: 2021-03-30 03:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ffbd48010397458af325f87c31e6379 SHA-1: 202aff55c90ad9e8bf86bbe765f885876a4a3afc SHA-256: d28c76ad749e1a36119c8a432f0bc38265561692f5d4b836552e57d7b9afac72
104 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of embedded URLs, including one pointing to 'lozipotod.ru', suggests an attempt to redirect the user to a malicious site or download a payload. The heuristic 'SE_DOWNLOAD_BUTTON' further indicates a lure designed to trick the user into initiating a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=a+manual+for+living+epictetus+free+download
    • http://zulesaxeririv.sportsontheweb.net/kikujajawoba.pdf
    • http://wikotimu.scienceontheweb.net/jimadekiwo.pdf
    • https://cdn.sqhk.co/dodirorip/gdLmxhf/animal_hair_stylist_salon_pets_makeover.pdf
    • https://static.s123-cdn-static.com/uploads/4471236/normal_5ffdef57db0de.pdf
    • https://cdn-cms.f-static.net/uploads/4465249/normal_60395cf72e3df.pdf
    • https://static.s123-cdn-static.com/uploads/4421767/normal_6006ab5274462.pdf
    • https://cdn.sqhk.co/kanedufopuma/VJGPNK5/96898138929.pdf
    • https://cdn.sqhk.co/janonaset/lsDggjg/1946569010.pdf
    • https://cdn.sqhk.co/doburazax/jhv6Agd/31558818626.pdf
    • https://cdn.sqhk.co/jivumigen/otBhbji/jowifen.pdf
    • https://cdn.sqhk.co/sugutomipu/Q5jaV97/31781210942.pdf
    • http://mekomob.getenjoyment.net/is_the_nj_real_estate_test_hard.pdf
    • https://cdn.sqhk.co/zotofoza/hdXhdjd/adobe_acrobat_reader_full_apk.pdf
    • https://cdn.sqhk.co/zifiguwosu/jhTjaCW/paypal_prepaid_mobile_app.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jiwotarotavuz/simple_medical_fitness_certificate_format_doc.pdf
    • https://s3.amazonaws.com/towutoginadivu/forgotten_password_on_excel_protected_sheet.pdf
    • https://s3.amazonaws.com/piwanisaj/weber_spirit_ii_e-210_parts_list.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec0f.bin
0495bc1d251f29c17ab35dd3fb3918d84edbaef16d527b6ec9d5e69b700891af
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 5616 bytes
font_01_sfnt_off0000ff27.bin
e1c99e4ff6dbed735bec39247b16f5f2f0507dc4c60920ae17596103d45b7955
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF27 11512 bytes