Malicious PDF — malware analysis report

Static analysis result for SHA-256 77256e192dc3672e…

MALICIOUS

PDF

95.6 KB Created: 2021-02-20 15:11:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2e8b37fa5a874d89c71263e1fc1cf077 SHA-1: 8981f88a326543b305fe35cf52ebdb1aab6bdcd7 SHA-256: 77256e192dc3672e52f22ffe7f239529639bb33baae0858daf8eae087b2d1480
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/strik?utm_term=oracle+sql+case+statement+in+where+condition PDF link annotation
    • http://confirmyourverifiedbadge.com/diferansiyel_denklemler_zml_kitapseke4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479223/normal_6007fadf618aa.pdfIn PDF document text
    • https://fofawuparojimi.weebly.com/uploads/1/3/1/0/131070926/xisapujodo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375194/normal_600647acca37f.pdfIn PDF document text
    • https://ziwuwozapa.weebly.com/uploads/1/3/4/5/134517717/gidozurom.pdfIn PDF document text
    • http://vamoktin.ru/the_magic_of_thinking_big_free_downloadqhew5.pdfIn PDF document text
    • http://djami.ru/57003556594noy2g.pdfIn PDF document text
    • https://niravewowinud.weebly.com/uploads/1/3/5/3/135343761/jebivepogex_tekokiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414848/normal_5ffd5b326f3aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449419/normal_5ffc2c88c9cd3.pdfIn PDF document text
    • http://dalkomis.website/begolipafupe0jpvy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/90730563851.pdfIn PDF document text
    • http://bixikaw.epizy.com/gukusumimibuwojekemer.pdfIn PDF document text
    • http://xofisoroj.rf.gd/informant_app_review.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/bestwap_song_dj.pdfIn PDF document text
    • http://pawolukexuw.epizy.com/crash_course_biology_10_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/dadopofo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13658 5424 bytes
SHA-256: b15de026c2e7096759359090bed05064f0eb91d3ed271314de1b4b60d062b586
font_01_sfnt_off000148a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148A6 11956 bytes
SHA-256: 791e8261d75b2cb6376864e44d9d8c87c23a2a812ec6268d9135133d53afc32e

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