Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d9d2e83ba700fa8…

MALICIOUS

PDF

89.9 KB Created: 2021-02-20 15:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e2920e2853fe1e252c6ee8bbeaf14169 SHA-1: 52d013b82178fdd7aaa89db6365958501490e73f SHA-256: 1d9d2e83ba700fa8fa9e08350f7cf2a27240f13ec61903b4ae53103d35ef1fd3
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to host or redirect to malicious content. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to exploit vulnerabilities or trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/aws?utm_term=celtx+vs+final+draft PDF link annotation
    • https://cdn.sqhk.co/vifejoneses/qgehimN/4093844058.pdfIn PDF document text
    • http://silver35.ru/first_alert_carbon_monoxide_alarm_5_beeps_every_30_secondso5zdp.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/dicmghj/sword_dragon_slaying_saber.pdfIn PDF document text
    • http://kusulapezep.iblogger.org/how_to_clean_whirlpool_duet_washer_filter.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/0ijwFhg/jalugibug.pdfIn PDF document text
    • http://brumbum2.xyz/nuxijavovepai95ok.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/xmicoii/iranian_drones_attack_saudi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pixagikaw.epizy.com/segefawutuwezowovipula.pdfIn PDF document text
    • http://fimogaselan.rf.gd/allah_hu_akbar_coke_studio_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/cataclysm_warlock_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/31727796941.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/bhoomi_karnataka_gov_rtc_online_report.pdfIn PDF document text
    • http://laxiruzeremifam.rf.gd/81166321902.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/wilotarudajenojaxepek.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/video_er_professional_for_edge.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/classroom_rules_free.pdfIn PDF document text
    • http://selafaveso.rf.gd/what_does_day_trading_buying_power_mean.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11773 3488 bytes
SHA-256: 4f41634859431d2a30b3bac735d338f4a5128e161686d69135f3255a50f3becd
font_01_sfnt_off000123fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FB 4932 bytes
SHA-256: bcc9208fa0a41f6beff5531083668fc1cae84afb3c5d14deabef1d2f380e4af4
font_02_sfnt_off000134d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D6 11148 bytes
SHA-256: 44c6abc9523b32bd820de512771467ff54bd1ffee4001745ba5a67530f1f46e4

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