Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4287f458fb50ebd…

MALICIOUS

PDF

76.6 KB Created: 2021-06-14 15:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e72ee17ecdf7b06e98c5759c1836d3ef SHA-1: b7d53d2c8584fd944243a6899d53e537c23561eb SHA-256: e4287f458fb50ebdeb56cd3971f1d95615dd0d3549a5a021c594d56dbc226c45
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 0.9996

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 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://xezojetit.ru/123?utm_term=hostal+la+casbah+formentera PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369905/normal_6044deaca7b91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452377/normal_604e1f3eab3aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413347/normal_600b6a3da2391.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4409630/normal_60b5c97ff0e27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528780/normal_606c18861f894.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474470/normal_5ff502f9cbe9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470409/normal_600fcf50b67c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480174/normal_602bda7616f61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384464/normal_600617750b75b.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/b794ab88-5034-4ac1-b64b-6f2f1e066248/jimoviletapuk.pdfIn PDF document text
    • http://pafesudive.pbworks.com/w/file/fetch/144690582/gezud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aafd81a3-ad79-4ef5-b72b-cd3e6b991c3d/dofabipurefek.pdfIn PDF document text
    • http://luwaruketux.pbworks.com/w/file/fetch/145287864/pixel_gun_3d_hack_mod_apk_free_gems_coins_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f4bd4b-271f-4649-a909-3008d9dd1897/sinuxizoxujukero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5914a2-1572-4d8d-8794-1d3031699b14/xapufewinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36700cb4-79b8-4f16-9264-29ebcbde81b1/what_are_conjunction_words_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4dff4db-ac7a-4305-a71e-7fac5a484316/ramowapiwobijepam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52901731-25a8-481a-bcc8-1613343c4b2f/rokit.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/f/95373068569.pdfIn PDF document text
    • http://zixereves.pbworks.com/w/file/fetch/144532983/xakakimox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49507d8f-149e-4c6a-914d-1095e65b9663/onkyo_receiver_tx-sr705_manual.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_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 5220 bytes
SHA-256: 9f706b58a5ddceddbd1fb3cf98f5f561f07f30ef204fa745fde9c55a04378f20
font_01_sfnt_off0000ff81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF81 11184 bytes
SHA-256: 42d6561caa29e26ccfae4981d0f96c4d9c2f77b7464d5ec7e06476577271f174

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