Malicious PDF — malware analysis report

Static analysis result for SHA-256 9599b05da0b942d7…

MALICIOUS

PDF

71.1 KB Created: 2021-04-01 14:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 595391798cb79485fe5ed50b01aa63d7 SHA-1: d9428ecae7ce5e257c8e235f79871dea1aa27434 SHA-256: 9599b05da0b942d7ef4bec85ef70228e86af0fa7716fd1acc516f1515dee6636
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into downloading a secondary payload. The presence of a 'download button' lure further supports the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/wix?keyword=slavery+webquest+introduction+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487906/normal_5ff765573358d.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/dWicggV/fememe.pdfIn PDF document text
    • http://lollipopa.online/se_trata_la_iliada_y_la_odisea7lqg3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_605a686ff1f6d.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/QQjjG3T/xokisutulijisatiwove.pdfIn PDF document text
    • http://senteber.site/javufazigovexeroxwy8yn.pdfIn PDF document text
    • http://znohist.site/83440539684qis3j.pdfIn PDF document text
    • https://cdn.sqhk.co/vovigewuva/31hwjiz/zudupa.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/wBifus9/zombie_invasion_escape_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/samojusive/tkgeSJq/diy_simple_modern_desk.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/JZfpjiy/boogeyman_wwe_theme_song.pdfIn PDF document text
    • http://reduslim-italy.site/ducane_filter_locationyilwn.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/gfjajgf/41569389374.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369491/normal_5ff17328e260a.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/jupudizadid/84204704226.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/funeral_invitation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/cycleops_magnus_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/jimufiloserisubub.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/gupubopovu.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/what_can_i_do_with_an_autocad_certification.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/adobe_acrobat_reader_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/dovedeziketufosizafutiv.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_off0000d8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B6 5620 bytes
SHA-256: df02c50f98c31b842a44b34a41eb061b29ebd416ecfd562c118f9c243cef723c
font_01_sfnt_off0000ebf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF8 10236 bytes
SHA-256: 6a82c510ad40ee0c53a05886381bd193cb19bcd31a6702a01ed8f6eea57938d4

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