Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb43fcb7b1249410…

MALICIOUS

PDF

84.6 KB Created: 2021-02-20 01:56:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 892d05380ea1262993c0f2c006a2c038 SHA-1: e4d6b10669be1b37e4b156bbe990fc2b7abeb928 SHA-256: bb43fcb7b12494108f5800b67c2058eba6b87a54b5d1b951af305bbd4c72f227
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL suggests a phishing attempt, likely to lure users into a scam related to 'penny stocks'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://yafferge.ru/strik?utm_term=penny+stocks+under+1+cent+robinhood In PDF document text
    • https://cdn.sqhk.co/sarunasol/jaG2ghh/car_simulator_c63.pdfIn PDF document text
    • https://cdn.sqhk.co/dusawugivepo/gggfygD/appdynamics_ceo_bansal.pdfIn PDF document text
    • https://cdn.sqhk.co/butituguxur/1jatHhj/eso_vampire_kiss_stack.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/PDYbNie/39447266012.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/hjgcTFV/69669040461.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/jeihicL/67895364021.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/N8iepKd/482392697.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/aCjcUhi/47145185819.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/CuwRjib/55476142268.pdfIn PDF document text
    • https://cdn.sqhk.co/guzelatolina/NYjgmic/norivowotibopabitor.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/hfWidgj/5239424244.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493610/normal_5fc7a3e966a92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_6025c35aefd3f.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxopejitin/gR4jik5/among_us_text_art_maker.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/tevomenil/microsoft_word_2019_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/buwurifofomurev.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/42756865239.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/bobbin_lace_beginners_guide.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_off000108d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D1 5144 bytes
SHA-256: 5e9e690533f15ef0a25cc97da52f0929cae7ec172aa54bd9932473cfc3e9e212
font_01_sfnt_off00011a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5B 13312 bytes
SHA-256: f567b17cbdf1f9299d6034a22a9d940b1453f0149970f87ce322b089423b1408

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