Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a88248addbca5b…

MALICIOUS

PDF

86.4 KB Created: 2021-04-01 10:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c011b091726249490065824dbd7b28d SHA-1: defd0cf92a9f02009f7f702a8f660a12140ff350 SHA-256: a0a88248addbca5b6714c4c6925b52b6ff83fa151581f93469e8345b4d23a601
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to the 'Enron scandal case study summary', likely a lure to entice users to click on the embedded malicious URL. The presence of multiple external URIs suggests the document is designed to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=enron+scandal+case+study+summary
    • http://dojaligiwojop.22web.org/113114617.pdf
    • https://cdn-cms.f-static.net/uploads/4444113/normal_60260e6757523.pdf
    • http://gubixazolela.sportsontheweb.net/money_banking_and_finance_book.pdf
    • http://fujabaz.iblogger.org/4868582820.pdf
    • http://presentinsta.site/asphalt_8_android_oyun_clubgi6ho.pdf
    • http://zegererevez.medianewsonline.com/que_es_la_comunicacin_corporativa_u_organizacional.pdf
    • https://static.s123-cdn-static.com/uploads/4496360/normal_5fe347ea58e19.pdf
    • https://cdn-cms.f-static.net/uploads/4390374/normal_603fe6bc75c65.pdf
    • http://thailandlove.site/gafemowejevirava8tdch.pdf
    • https://zejibafubetu.weebly.com/uploads/1/3/4/1/134108860/4209386.pdf
    • https://foworagajiwodim.weebly.com/uploads/1/3/0/9/130969946/vaxezi.pdf
    • https://lipopujowojirew.weebly.com/uploads/1/3/1/4/131408954/xanex.pdf
    • https://cdn-cms.f-static.net/uploads/4502236/normal_6054829c86f67.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a856b04b-ad24-4e72-957b-e1acccc101bb/mesilenodevunilivafubiso.pdf
    • http://wazuvolixevafo.rf.gd/58543623892.pdf
    • http://puzawibopuxeluv.epizy.com/98382365323.pdf
    • https://uploads.strikinglycdn.com/files/42d56897-ea29-448e-a6a8-20db44bac1bb/atma_shatakam_lyrics_in_english.pdf
    • https://uploads.strikinglycdn.com/files/0c1c4c75-4c46-4a09-b9cc-91b202a7a48f/all_physics_igcse_formulas.pdf
    • https://uploads.strikinglycdn.com/files/c930a7d6-7048-4c8e-8396-9dee8cb6af08/wipabavepizu.pdf
    • http://bidogoko.rf.gd/fepugowite.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_off0001136e.bin
7bc8e7710c8107eba93309039ed9a75fd0b4661a642c63f800b73147ff5984f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1136E 5144 bytes
font_01_sfnt_off000124e3.bin
3008ef76d08d4b72688d0966093cffcfaaef3b6e53168360b163893c83d7f8fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x124E3 10960 bytes