Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e6d10078d033f7…

MALICIOUS

PDF

73.9 KB Created: 2021-03-18 05:58:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ccbe7b3c7e4b632183510326d009fb67 SHA-1: a372c17257597ed71b18ab22e4e037275d2dbd2e SHA-256: 95e6d10078d033f72a2b135366b54d1453d5946e03f5eaadd79780c8523bc027
164 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URL, suggesting it's designed to redirect users to external sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links point towards a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/strik?utm_term=how+to+charge+a+canon+rebel+xti PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373511/normal_6043fd6412224.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485010/normal_60065a4bc3dde.pdfIn PDF document text
    • https://cdn.sqhk.co/wexapitode/RBghrqc/wipowunet.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/jaijyJF/55077203923.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/ihgQH5J/portal_wifi_file_transfer_for_windows_10_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zurajekiviw/gejqgf7/tikutisijo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_1445e44f9e2c4d5ea3c7b89cf46c2a29.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liwara/remember_me_guitar_tab_sheet_music.pdfIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_c849040b43be45ca9a021e68aaf65e63.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kubafezin/sql_injection_test_site.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/material_ui_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/ielts_listening_homestay_application_answers.pdfIn PDF document text
    • https://8a05da06-75fd-4b4b-8779-f7668a2fa4a0.filesusr.com/ugd/da32d9_9f4492baed98405986f7dec159641146.pdf?index=trueIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_3f2934ed8cf44a6db443708a6d9b0a20.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/perurulexi/how_do_i_program_my_ge_universal_remote_to_my_roku.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_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 5144 bytes
SHA-256: 89e726fc3e1f15898979a5b018858084c199a80125927c580d363262ffdf9b28
font_01_sfnt_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 11132 bytes
SHA-256: 269ffad49307841936072d7ac260fce2cc323b07ac512ff8fe87dc3fa8f4c7f6

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