Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a73fd9218fcb08a…

MALICIOUS

PDF

68.9 KB Created: 2020-12-24 08:25:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f818738fa2be24c795117b192a931958 SHA-1: be962a36b9d754a3395b26dc592addd1d9b13f5d SHA-256: 9a73fd9218fcb08a31b8f50a933cac6d5c5a030f357b8d23600bd57ad79add14
154 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 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 0.9997

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?utm_term=free+robux+website+2020+no+human+verification In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_5fbc84401168d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_5fadcafe0a184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465394/normal_5fb406847e832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_5fa5762e263a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_5fa4d7ef70dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f910b5ddeda0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9049e7f-c29b-42af-a493-f87a1ad3b2fa/definicion_de_capacidades_fisicas_condicionales_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a58660b7-13ff-4c7c-ac7e-ae64e22b52b3/8896309055.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/40294277977.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/3331288397.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/lerumelet.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/acquisitions_incorporated_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/97247298039.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/19006666453.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_off0000c6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EF 5676 bytes
SHA-256: a35cd5f524768dda16150eb6d2d5bb28c046578293403c7df26968544310b98a
font_01_sfnt_off0000da31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA31 2092 bytes
SHA-256: 78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2
font_02_sfnt_off0000e3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D5 9980 bytes
SHA-256: 43d0716822f691d9aef542f40cd79ed92ab9d1eaccfd8c4e8db50ff9989bc36e

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