Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b899e6489b54dd9…

MALICIOUS

PDF

76.8 KB Created: 2021-03-20 21:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a3c303b6ab345f68e5997ef68c978e5 SHA-1: 7e6dae7203f82256df3fd2a16d56ac657529433c SHA-256: 0b899e6489b54dd947d51b56fb4a8680b3ab5413a5fb250b4c5b2197d5b89107
96 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated content and a high ML classifier score, indicating malicious intent. It embeds external URIs, with the primary one being `https://mezovuduw.ru/aws?utm_term=rainbird+5000+adjustment+diagram`, suggesting a lure to a potentially malicious site. ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/aws?utm_term=rainbird+5000+adjustment+diagram
    • https://pizakatunif.weebly.com/uploads/1/3/1/8/131856177/45e054c4.pdf
    • https://static.s123-cdn-static.com/uploads/4465128/normal_5fe4e600bfd42.pdf
    • https://cdn.sqhk.co/kesufetumo/gJMjaic/helvetia_insurance_annual_report.pdf
    • https://cdn.sqhk.co/xifobariw/ihvSLqY/21208870968.pdf
    • https://mogimefiledewe.weebly.com/uploads/1/3/1/8/131857364/7637615.pdf
    • http://hydraruzxpnew4af.exchange/mixasadevepamcs8co.pdf
    • https://cdn.sqhk.co/foxenikap/fCfji3a/56150354478.pdf
    • https://defavelusanopef.weebly.com/uploads/1/3/5/3/135345674/sejevuxikoni_sinopamun_buxisamaxuwoned.pdf
    • https://cdn-cms.f-static.net/uploads/4426675/normal_604f443b78681.pdf
    • https://kazajibabagak.weebly.com/uploads/1/3/4/4/134467412/8887627.pdf
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/5018606.pdf
    • http://discount50it.pro/percy_jackson_and_the_olympians_movicrqzs.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gadumagabusodel/fezewokadekimebavaxexum.pdf
    • https://uploads.strikinglycdn.com/files/f9c7e438-be0b-41f6-b7ad-67ef64ed13e6/longman_english_dictionary_free_download_for_pc.pdf
    • https://uploads.strikinglycdn.com/files/4ae23d78-c6c8-4bd1-9979-bf0659f1dfa7/can_dry_fruits_increase_weight.pdf
    • https://s3.amazonaws.com/tifuwuw/guided_tours_new_zealand_australia.pdf
    • https://uploads.strikinglycdn.com/files/ebdede0a-c870-40c2-ad78-30439f96d2d1/plane_shift_amonkhet_dnd_beyond.pdf
    • https://s3.amazonaws.com/kujapomib/2872410590.pdf
    • https://uploads.strikinglycdn.com/files/c6e64488-95f8-4bd0-80e7-3b4275878293/vw_polo_6r_service_schedule.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_off0000ed45.bin
a48203a5a14133bbcb2582d1de5dc963bf0a86001c19b7223c2d77aa1137941b
pdf-font-stream PDF embedded font (sfnt) at offset 0xED45 5604 bytes
font_01_sfnt_off00010040.bin
8cd2ccdc14fb588d77dcb30e038b5b5e95e3812f52b0694ba94264f1bc2f115c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10040 11116 bytes