Malicious PDF — malware analysis report

Static analysis result for SHA-256 8323dee3ae6a5dbc…

MALICIOUS

PDF

70.0 KB Created: 2021-01-22 05:33:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f50cf206dce2d001412f516af61cb022 SHA-1: 0f2afa8476de8e29dfa0d64c920d595a58b1fc7e SHA-256: 8323dee3ae6a5dbc66fb121a0ab918a39f7ea6ad570c591c142dc661299cadbc
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=pmay+application+form+pdf+2018'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates a malicious intent to redirect users to harmful content. The document body, though heavily obfuscated, contains text related to 'pmay application form pdf 2018', suggesting a lure for phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://gettraff.ru/aws?utm_term=pmay+application+form+pdf+2018 In PDF document text
    • http://dofuluxaruze.22web.org/aftermarket_wheels_tesla_model_3_performance.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/jenagubadopi/bohemian_rhapsody_piano_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/8283499399.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/sitegoxizawuwot.pdfIn PDF document text
    • http://funazowo.rf.gd/45378630595.pdfIn PDF document text
    • http://fixadamobus.epizy.com/vertical_farming_industry.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/activated_sludge_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/grade_11_english_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/mutokezape.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/d_d_volo_s_guide_to_monsters.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/chicago_manual_of_style_cover_page_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/4542166680.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_off0000d368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD368 5744 bytes
SHA-256: 83fe188f39932f1b6e80670ec8bebd7c79805fd1750f7b5adcbc72cd1cca26ff
font_01_sfnt_off0000e6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F6 10736 bytes
SHA-256: 4779934f264eea1f19045f302d6273ddec2e147ccfba8227081cf78378e3be79

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