Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f9edd2e3ca5950…

MALICIOUS

PDF

79.8 KB Created: 2021-02-24 03:36:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c4285bcc39c4c21ce71a580f2ca7a7dc SHA-1: 8e31d1cc67e8578b8fbbe8f70b88fb3a65791ded SHA-256: e1f9edd2e3ca5950a8e213047f616a3afbb99b923ebdf4a66cd57df2ef0e46c3
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://druttle.ru/123?utm_term=dell+7010-sff+core+i5-3470 PDF link annotation
    • https://cdn.sqhk.co/beratinuga/ijeji3o/jopipus.pdfIn PDF document text
    • https://dopakujovifoba.weebly.com/uploads/1/3/0/7/130739833/8140779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_5fda85b61cfd8.pdfIn PDF document text
    • https://roxagidu.weebly.com/uploads/1/3/4/7/134748987/4687749.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421042/normal_5fcc9abb4bfa7.pdfIn PDF document text
    • https://tetiwaxope.weebly.com/uploads/1/3/0/7/130776033/mikedunara.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459784/normal_5fe4dc3f56edc.pdfIn PDF document text
    • https://wojozumokibenap.weebly.com/uploads/1/3/4/0/134097994/gimosaw-leximunifofabuv-gewexetuxikof.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/QQggajd/rubber_chicken_sound_effect.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464877/normal_60207c8320490.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/gjhgMij/whatsapp_viral_video_2019_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_6016c5dce0608.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fofebur.rf.gd/kafekotexitigarujapaxubug.pdfIn PDF document text
    • http://sabuxixu.epizy.com/xirarumevulidi.pdfIn PDF document text
    • http://todizegi.epizy.com/malachi_martin_vatican.pdfIn PDF document text
    • http://xetawirozam.epizy.com/zimudisozeriv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 5348 bytes
SHA-256: a0bbac236ae3ce5035e91d434929f2cd5c91da43868952fde5c53924e60f3db7
font_01_sfnt_off0000edc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000f651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF651 10844 bytes
SHA-256: a8c332c93ef163dce51ecb42472f33009d59584a2e37a85881b499b0d042a74f
font_03_sfnt_off00011b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3F 16972 bytes
SHA-256: ac95bc1fb7913b0f3e701e2cd077342a8b2a32d952daa6b019ca4cb845d5ea36

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