Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f08be648e01a25c…

MALICIOUS

PDF

69.6 KB Created: 2021-03-22 20:36:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 011b0f7b8e936c35be57e0baee02c706 SHA-1: f0e78e417e2de0f7bb4f42f86c8e17e4c0b43116 SHA-256: 4f08be648e01a25c21f504bdfeff127221e9aa32fe663477d2ff92b0b0dcddfc
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. One of the primary external URIs points to 'bologen.ru', which is suspicious. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest it's designed to lead users to potentially harmful content.

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 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.
  • 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://bologen.ru/wix?keyword=mrs+peks+classroom PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383322/normal_6012e04cab56b.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/m5HigYP/badminton_league_mod_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411932/normal_601840634b2cf.pdfIn PDF document text
    • https://cdn.sqhk.co/belexewuwif/cQrjiid/punjabi_radio_italy_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448980/normal_5fc9a059447e3.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/ighjgfO/esl_have_something_done_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/PAiahiH/marco_s_pizza_nutrition_large_pepperoni.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/gowebabuxogiro/vodajeje.pdfIn PDF document text
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_642ed371fbdd43ce9a52edbb0ca818ae.pdf?index=trueIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_95e0669b09e7471ea0b2a1169d651e6f.pdf?index=trueIn PDF document text
    • http://nadilafirot.rf.gd/finitely_and_infinitely_repeated_games.pdfIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_c06f5b13326146ba83ebab290770685e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/google_sheets_conditional_formatting_reference_another_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/lubuju.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/8770232958.pdfIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_9b6f4b143f714b87a31fcd6ed196ebff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/60701925660.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/ppt_background_images_free.pdfIn PDF document text
    • http://fozufululuk.rf.gd/pifubavuwi.pdfIn PDF document text
    • http://vebaxabono.epizy.com/apoptosis_and_necrosis.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/world_economic_forum_tourism_competitiveness_report.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_off0000d3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C8 5148 bytes
SHA-256: eba04231007615b6f3bde917fefad0e60182a03ea76342073561a13fd5270ac6
font_01_sfnt_off0000e544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 10380 bytes
SHA-256: cd68e343fc34a034d51f922218c0cbed7d0b1f89e27aece8516721d3f8d739b1

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