Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f8ac88761eb038…

MALICIOUS

PDF

93.1 KB Created: 2021-03-19 22:11:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b78b4b4614ed13904f7e56b408c00f4a SHA-1: 45f02696f66f2eb797389d0ca54be623910ea8aa SHA-256: 82f8ac88761eb03868f6023993a6e8563bb923b9d00dee412524ea12f45339db
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that mimics a search result, likely to trick users into downloading further malicious content. ClamAV detection and ML classification strongly indicate malicious intent. The presence of embedded URLs and the nature of the detection suggest a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/wix?keyword=applied+kinesiology+books+pdf+free+download
    • http://sdek-24.cc/windwalker_monk_pvp_talent_guidea0bvm.pdf
    • http://soul-felt.com/emergency_contacts_form_for_qfes_monitored_fire_alarmsfwj0v.pdf
    • https://risegutu.weebly.com/uploads/1/3/4/2/134265716/minagotonabaw.pdf
    • http://fito4ka.xyz/lista_de_verbos_en_ingles_regulares_e_irregulares_mas_comunes9c38q.pdf
    • https://vururera.weebly.com/uploads/1/3/4/4/134493513/7fae90.pdf
    • http://segwaywheelchair.ru/apache_hive_beelinectz44.pdf
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/levokatinuk.pdf
    • http://lasns.fun/newegg_cyber_monday_20194ypqj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fiwarirekagugen.epizy.com/33119709597.pdf
    • https://s3.amazonaws.com/jenisozazewubo/88434880593.pdf
    • http://jetetejev.rf.gd/sanubi.pdf
    • http://melamepapate.rf.gd/autocad_plant_3d_2018_manual.pdf
    • https://1f9cfe0c-d655-4514-b58a-75380282e405.filesusr.com/ugd/d31784_6b5b5427a1874704bc87f964cc63d0f2.pdf?index=true
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_2d9f625c11e747c3998d3e1d367d25c3.pdf?index=true
    • http://pipiwilevo.rf.gd/dolexuduxujedoninidat.pdf
    • https://s3.amazonaws.com/jovekus/smart_ups_1500_rm_silence_alarm.pdf
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_021554196c834ab8acffd2c8273e8078.pdf?index=true
    • https://s3.amazonaws.com/gurafoga/20731059364.pdf
    • http://lidiremuvuzanas.rf.gd/juxifotuduzun.pdf
    • https://s3.amazonaws.com/rilexazejuzovep/filofax_pocket_divider_template.pdf
    • https://s3.amazonaws.com/zurovajij/telefono_informacion_iberia_express_gratuito.pdf
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_9872e049eaa74a378ca8f720fb838039.pdf?index=true
    • 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_off00012ce4.bin
871231c113e843a633773fb693c6a0c37250abd5668c29f73ca18dff662d8d0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE4 5596 bytes
font_01_sfnt_off00014015.bin
f9c2dfc54be61b690bf460e71829d7f769e06ea019f48665da80dd0dc8845ed4
pdf-font-stream PDF embedded font (sfnt) at offset 0x14015 11468 bytes