Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f4efa49c913802c…

MALICIOUS

PDF

40.8 KB Created: 2020-11-08 11:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: bb8db28fa4e04efe661d157666b51855 SHA-1: f4fe0c3adcbe9b27c831185eb753b74d6b5b6bba SHA-256: 1f4efa49c913802c2cad58b3fb50381bdf182cd4a0187fd367faf1bce84b605f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://traffine.ru/aws?keyword=college+scholarships+for+fall+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5fa669546fbe3.pdfIn PDF document text
    • https://dojukigefob.weebly.com/uploads/1/3/4/5/134577696/woremubipojijo_tejed.pdfIn PDF document text
    • https://rebifigu.weebly.com/uploads/1/3/4/6/134663288/2395999.pdfIn PDF document text
    • https://jimazakogise.weebly.com/uploads/1/3/4/6/134612968/d038df4c8.pdfIn PDF document text
    • https://guzejanum.weebly.com/uploads/1/3/4/6/134681017/5013432.pdfIn PDF document text
    • https://dalowosa.weebly.com/uploads/1/3/4/3/134383453/8911703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_5f98d2c11844b.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/lufalosuwamunuwonofe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_5f8d52f2d9e52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pujinit/how_to_change_windows_password_ctrl.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/chapter_4_to_kill_a_mockingbird.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/dyson_vacuum_cleaner_manual_dc14.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_off0000613d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 5456 bytes
SHA-256: b238e41390af3708d05c6307ecee5af0d5eef2d3302ed26c702164f21bcc8355
font_01_sfnt_off000073c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C7 10180 bytes
SHA-256: 464a94fcf35d3f86d7f2c37c09d1d070c2fc36a02ae543bb22f787e7a9991f04