Malicious PDF — malware analysis report

Static analysis result for SHA-256 15255de36033e276…

MALICIOUS

PDF

75.2 KB Created: 2020-12-22 11:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9f6235a9831fcf657b5d49d991556fd2 SHA-1: b9c96d8aae720fdc185d9d08e7b2d4ac7659b669 SHA-256: 15255de36033e27646ed95cb8fb79e231e1e1e3ad204ba67f6f05a307b638485
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to redirector infrastructure. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, and another identifies it as a PDF link farm. The embedded URL heuristic also confirms the presence of URLs within the document body. While no scripts were extracted, the sheer volume of links and the critical heuristic firings strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://gettraff.ru/strik?utm_term=pixel+art+design+online In PDF document text
    • https://zukedobawalot.weebly.com/uploads/1/3/4/5/134526307/5282451.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/8f24ebaa3f201f6.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/fekaduvopigab/gold_mangalsutra_designs_catalogue.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5108d5e8e827d42a8a9a7/t/5fcbb5f1b6b7366152ff4c38/1607185906494/ice_scary_teacher_scream_4ds.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/transient_ischemic_attack_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/astable_multivibrator_using_555_lab_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf045b7ee8e70759d229a/1606217799101/dan_ball_powder_game.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/chennai_express_movie_in_tamil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78fa9f784ea513680d888/t/5fd6338a154d727871e53d3e/1607873418769/mozevolu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3979ae5c7695ca9ac7d5a/t/5fc526b1173fb5383b4912e2/1606756019469/sensation_and_perception_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/kilimidelovikukafafivuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce979af613214984219112/t/5fd654f9313c42342b8b179f/1607881977606/annex_8_icao.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf61fa1972c46e3c96883f/1606377984413/nokenelirenojejep.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52e77e5c7695ca9b771ca/t/5fccafb1c00f007ceae42f88/1607249841855/ruxumimo.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/family_tree_templates_with_photos.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_off0000e956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE956 5060 bytes
SHA-256: effaddf0825cc0a5fbec95daddc078afbb0716b111cc7c69d2fba278f35b1486
font_01_sfnt_off0000fa9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9D 11388 bytes
SHA-256: 4ae6a2e5a42a07bdc4156d8675dfd59806cf7ad5d6ad934ef5ca5835b900b968

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