Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd1fdd40e4b0f42…

MALICIOUS

PDF

84.6 KB Created: 2021-03-14 08:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 05341b3d49dec1e4fcc6f905ca99cac8 SHA-1: b3215bd36c82f99c38ccf8c9c0784d2af276132d SHA-256: 5bd1fdd40e4b0f424c6859d9f046f3ac4613fadced64c5bf169cf705480b1719
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/award?keyword=carols+of+the+bells+pdf PDF link annotation
    • http://wersita.space/473803758378kp7b.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/bucket_list_template.pdfIn PDF document text
    • http://limons.space/eclipse_junit_coverage_reportj7jh6.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/jicBigx/french_tip_acrylic_nails_with_glitter.pdfIn PDF document text
    • http://ketupepid.22web.org/ladiwofode.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/sBjdifR/39127163235.pdfIn PDF document text
    • http://hookup154.space/language_leader_coursebook_answer_keypqafo.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/malirefiveneluzusuzaw.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/gehbVha/pentagon_shape_exterior_angles.pdfIn PDF document text
    • http://samelike.site/website_banner_template_for_photoshopd7167.pdfIn PDF document text
    • http://wokizunapajunez.iblogger.org/pademevivuvubeguku.pdfIn PDF document text
    • http://stingeksoj.online/42656128431nkneq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_b0c91f9979a54b9596cd794e2f091626.pdf?index=trueIn PDF document text
    • http://bazitobabin.epizy.com/5874542460.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/19088317488.pdfIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_9c59102d6a264499b52b19201b6529b0.pdf?index=trueIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_cd852d8a66a6450da684c2f43c557694.pdf?index=trueIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_5be642633d3d46b79da3b3c880d50ddb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/022dfefb-a921-4b08-a165-81fdf51aa770/9645034159.pdfIn PDF document text
    • http://xenexafa.myartsonline.com/mepazemoxawajiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d2a526-986c-4762-a781-a955965e9915/87033287663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33c54fa-5b30-4613-b9c3-e77c41df3a96/80902441819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78c04295-b8bb-49dc-8183-fc264922f2e7/30309318344.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_off00010e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E17 5176 bytes
SHA-256: f75a0c895e1b3959c86b1bb78fff215212fbf66f57f7112e9c7764f718b83d32
font_01_sfnt_off00011f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9D 11128 bytes
SHA-256: 887730e2d2d695d9e33cd04638dce67e6c71ac8af99b5f8479e347d3dc5e8049

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