Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1209f7a8a8013b…

MALICIOUS

PDF

66.1 KB Created: 2020-12-15 11:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7e1921b3be28de83fe3aaa9f60424331 SHA-1: 85f34e69d2b81ccb267cdc235d2e42e78c5ade55 SHA-256: de1209f7a8a8013b21d45ce970cf825081b01607989d86fc34b44c0b10f97cdc
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://cctraff.ru/strik'. Additionally, it exhibits characteristics of a social engineering attack ('ClickFix') that instructs users to execute commands, likely to bypass security measures. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://cctraff.ru/strik?utm_term=xtreme+play+tab+v2+firmware In PDF document text
    • https://pusazaninad.weebly.com/uploads/1/3/4/3/134358808/1173618.pdfIn PDF document text
    • https://firupewuvub.weebly.com/uploads/1/3/4/3/134330425/add9e07444d19.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/7f9a31c7-e4bc-4fc0-8470-c4c7b76560de/perspective_on_or_perception_of.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d38f8cdb769c6d91c4c/1606372664609/59390737332.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea21c30a162e0c52977d/t/5fc56eaf173fb5383b5b3c4f/1606774452979/9th_grade_math_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8ed834-910c-4256-9f8d-b548cfc781b4/68510496991.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce003f5895864d89538274/t/5fd1d9517cf94534dc5cd722/1607588185836/knife_set_costco.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50dfce5c7695ca9b64519/t/5fce04f3cded405bb8fdfd55/1607337204896/ralph_s_famous_italian_ice_hours.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c9c0abaecd33183b2183/t/5fc5cc42eaf37e3b64653b89/1606798403939/falls_lake_academy_volleyball.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc169478139af037648d9ed/t/5fcca9eb3ff1011540ed27d6/1607248365850/scary_teacher_3d_mod_apk_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea21c30a162e0c52977d/t/5fc1c4943570fb44d1447716/1606534293335/vista_20p_programming_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/gta_5_apk_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e5b8a3bf4b14aba92f9c/t/5fc12e413c6ccf69f3886fa1/1606495809960/etowah_county_sheriffs_dept_mugshots.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_off0000c48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC48D 5372 bytes
SHA-256: 11abf0d32886c8fbe05ebd966647e1e12a344798bb020e70c518235fa76fa66f
font_01_sfnt_off0000d6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D8 10732 bytes
SHA-256: b57178a38f88546c6e9f16f46ccf2b8961ac4ae65854e38204344bca6725ced5

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