Malicious PDF — malware analysis report

Static analysis result for SHA-256 0129ed6f1a2db5ba…

MALICIOUS

PDF

68.8 KB Created: 2021-02-12 03:59:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e29bf0c49ca6eb8de5ed4ee90f0e096e SHA-1: ff0cc9851ba2bf76d4f7693eb58b06e3a1cb63cb SHA-256: 0129ed6f1a2db5baeb1cae3baed6c51c1924664d787da19badbd160500d7d717
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to S3 buckets and Weebly-hosted PDFs, suggesting a link farm or content distribution network for malicious files. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score strongly indicate malicious intent. The document body's reference to 'Madeleine McCann book pdf' is a lure to attract victims, likely leading to the download of a second-stage payload from one of the many embedded URLs.

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://seumenha.ru/123?utm_term=madeleine+mccann+book+pdf PDF link annotation
    • https://lipowife.weebly.com/uploads/1/3/2/7/132740586/ladubalutuxeke.pdfIn PDF document text
    • http://wimazosuwoxugij.66ghz.com/24839099611.pdfIn PDF document text
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/951aba.pdfIn PDF document text
    • https://dukuvurijo.weebly.com/uploads/1/3/4/5/134522813/loduzerobugu.pdfIn PDF document text
    • http://visatog.22web.org/quizlet_apk_android.pdfIn PDF document text
    • https://zugivosiruboni.weebly.com/uploads/1/3/1/8/131858419/ligomixumi.pdfIn PDF document text
    • https://zowololo.weebly.com/uploads/1/3/5/2/135294949/7443885.pdfIn PDF document text
    • http://vizezokope.iblogger.org/tujidelogisivat.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/gazitif/assamese_bihu_dance_video.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/zusep.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/correct_plural_form_of_bronchus.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/activex_control_internet_explorer_11.pdfIn PDF document text
    • http://jivobolalozula.rf.gd/57685674778.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/angular_6_reactive_form_array_example.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/runitezipogexatak.pdfIn PDF document text
    • http://xijopugoluf.rf.gd/pavutomami.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/emotional_status_marathi_video.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_off0000d1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B7 5236 bytes
SHA-256: dd9421ba3f134cc4e686456289e5a2f234e94f07b627ab73515a8af5a42d66dc
font_01_sfnt_off0000e387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE387 10232 bytes
SHA-256: 8e41242346fd8dee12a610840cc65b7b866d97373ec54f29096e26169c8cdb3b

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