Malicious PDF — malware analysis report

Static analysis result for SHA-256 d922dab70ccf3d9b…

MALICIOUS

PDF

71.9 KB Created: 2021-02-20 02:45:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: fb77ff5200abfee18207872c5e4f7a5e SHA-1: be72192303a7725ddf4f3e598d309ea9ce407968 SHA-256: d922dab70ccf3d9bcc2fff46a1afa4ed52a342b7238f8b7d03957e371f9fb4bf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/123?utm_term=sample+behavior+plans+for+preschoolers PDF link annotation
    • http://xexogafuko.22web.org/94343867864.pdfIn PDF document text
    • https://sibufelaviwum.weebly.com/uploads/1/3/1/4/131438604/f2f03a750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457838/normal_600a4a2571477.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/g5iggjj/rowalitiluniluligugoli.pdfIn PDF document text
    • https://rejobasagiletez.weebly.com/uploads/1/3/4/6/134642313/lonejitubojakakum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421612/normal_6027671e28454.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/901409b7284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446285/normal_60060223911d8.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/gghhibW/gunship_strike_3d_mod_apk_happymod.pdfIn PDF document text
    • https://fefojaza.weebly.com/uploads/1/3/4/4/134480993/8429837.pdfIn PDF document text
    • http://jisijopimif.66ghz.com/wijafezozagujawike.pdfIn PDF document text
    • https://cdn.sqhk.co/saboretiki/hfgjHeK/free_voice_changer_for_discord_clownfish.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460946/normal_600aa886ce1d1.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/wegemebufojafak/acute_otitis_media_guidelines_2018_aap.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/33672293231.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/39929027034.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/2169463014.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/column_chart_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/archero_update_apk.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_off0000dce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE6 5556 bytes
SHA-256: 8fd2b08af589cf472838e3f86117f8a3c448f9a23b8fa306a364b44ac27235bc
font_01_sfnt_off0000efa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 10148 bytes
SHA-256: dc224dbb91f0757cdfb9dcfcbd3bb31d97466b708fd1e39a7e7b04d0789259e0

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