Malicious PDF — malware analysis report

Static analysis result for SHA-256 17af1997d49e2d67…

MALICIOUS

PDF

72.4 KB Created: 2020-11-30 23:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d67086be004a44ac2b320edb94c801eb SHA-1: 9282aa4dcb1ff56c1f547207d768dd7003a80011 SHA-256: 17af1997d49e2d67f5f0073bb0f271d63c75e2756219dfebf3701a3bb4be92d6
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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/strik?utm_term=traits+of+an+epic+hero+beowulf In PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/6d0888ce3bf969.pdfIn PDF document text
    • https://xalesuben.weebly.com/uploads/1/3/4/3/134368019/pelosepiliretem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f953e9c18224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_5fbbb33596cbb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bf3d2def-40cb-46e5-ab5b-20edac05444d/folizoxikikufipavu.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/lekepuziwaligefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d5dafe-5112-4958-9474-33abcf448a85/canales_de_distribucion_concepto.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28a899698b02c7f2b0c7e/t/5fc4a49f61e25426e1cb826d/1606722719320/vapegibalolixut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc80d7d-aec0-49f5-8bfc-87f6d8bf2d69/zibotejijarowogasone.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/slope_stability_and_stabilization_methods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e98426-2824-4c6a-a936-613dec57d596/super_smash_bros_ultimate_zero_suit.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/67388618329.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/36586973989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03aa4b0a-19e6-4c2a-b0c3-96de60af10fd/inin_02_guia_pedagogica.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B7 5164 bytes
SHA-256: d33bb0397567f750952505a8d9d76d76e11d6fb2e6fc0e5c1992f0f90cf2918c
font_01_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 9816 bytes
SHA-256: 8e2c341485e1a9fcb41abd79f1b665c80f48c7f0faafdef528bd614499acb713
font_02_sfnt_off000106ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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