Malicious PDF — malware analysis report

Static analysis result for SHA-256 c006f0143f5c8694…

MALICIOUS

PDF

61.0 KB Created: 2021-02-13 15:51:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d0ba80ec54e79b859d86123a3ca9ba87 SHA-1: a5f3bbecf6ea4b681f67e9505f766c5b58b6e500 SHA-256: c006f0143f5c86941bbde770093b4eb8f0b9debd2597ebae6d68f60f9681ce70
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 'jacksth.ru', which is likely part of the lure to a malicious site. The document body, though heavily obfuscated, contains text related to the Escambia county property appraiser's office, suggesting a pretext for the phishing attempt. No scripts were extracted, but the presence of embedded URLs and the overall detection suggest the file is designed to redirect users to malicious content.

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://jacksth.ru/123?utm_term=escambia+county+property+appraiser+molino+office PDF link annotation
    • http://copyrighytsupport.com/nogejetid8bxbt.pdfIn PDF document text
    • http://bestgirl69.com/vevoxefomevizifnjm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401716/normal_5fc8c35f14208.pdfIn PDF document text
    • http://xrootunited.com/512443763790uice.pdfIn PDF document text
    • http://medway24.com/chief_keef_torrent19ppw.pdfIn PDF document text
    • http://amorexpo.com/sujiviv24cm.pdfIn PDF document text
    • https://cdn.sqhk.co/duzokezubeka/UohT4Fb/robo_legacy_strange_robot_war_battleground_mod.pdfIn PDF document text
    • http://raisinsapp.club/87783974810nbair.pdfIn PDF document text
    • http://matroskin.space/liverpool_real_madrid_2009_formazionip493w.pdfIn PDF document text
    • http://top-salez.site/econometrics_final_exam_questions_and_answersuoce6.pdfIn PDF document text
    • http://imm-shoes2.club/best_android_game_engine_3dp7ma0.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/xuvamuba/at_a_glance_widget_kwgt_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/tovokozaxuzusagokupili.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/sexuluxifalofetizosina.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/xidabogonazojupidepo.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_off0000b388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB388 5360 bytes
SHA-256: a3a55d2f2dae8a9dfb8fbf6507f29c22bd60f889f190d40763d57e70f851bb4e
font_01_sfnt_off0000c5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B9 9644 bytes
SHA-256: 47f6c060128738382b2403605be45777c948664d8c9561401ce3b25399c0ba26

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