Malicious PDF — malware analysis report

Static analysis result for SHA-256 513453b30dc2abea…

MALICIOUS

PDF

79.6 KB Created: 2021-03-01 15:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8fef880ff4f46680477ab1b0bd39ce44 SHA-1: 5dcdf2ee46baa15ef48da9d514b3b084f3f1228c SHA-256: 513453b30dc2abea0c8ac39f2d2a71e397d2badecef6a8e0f4682dde18cb9567
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, many pointing to disposable domains, suggests a link farm designed to redirect users. The primary URL, https://baarspo.ru/strik?utm_term=baby+grinch+costume+amazon, indicates a lure related to a popular search term, likely to trick users into clicking through to a malicious site. No scripts were extracted, but the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

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.
  • 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.
  • 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://baarspo.ru/strik?utm_term=baby+grinch+costume+amazon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421944/normal_6027dfd3d44d3.pdfIn PDF document text
    • http://duvikerogene.iblogger.org/how_to_stretch_for_karate.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464524/normal_5fcc9032c0ef5.pdfIn PDF document text
    • http://penageli.getenjoyment.net/is_there_sequel_to_the_darkest_minds.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_6011797267c17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426832/normal_602eee7aa3ed2.pdfIn PDF document text
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/8270879.pdfIn PDF document text
    • https://pajujetijawu.weebly.com/uploads/1/3/4/3/134334360/4168527.pdfIn PDF document text
    • https://joxunirefebemi.weebly.com/uploads/1/3/4/3/134319414/fejekojapujuxexip.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/axiom_pro_49_power_supply.pdfIn PDF document text
    • https://gisafumeg.weebly.com/uploads/1/3/6/0/136098567/purojotugunul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_6027de79216b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445864/normal_602649c71df91.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/gluten_free_meal_ideas_for_dinner_party.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475389/normal_5feb408b348d3.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/34160109105.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://towidono.rf.gd/how_many_calories_in_a_medium_iced_mocha_coffee_from_dunkin_donuts.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/football_manager_2020_apk.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_off0000f808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF808 5524 bytes
SHA-256: 6155e8dc31b387054f980b74f4623798c733efbdb3d70d38920408ca3bb84f6e
font_01_sfnt_off00010aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 11344 bytes
SHA-256: be62195374c6c055a8bff27f5d770fb0d0c69dbe92e01cb08fbbcd36e08bebc0

Open this report in the interactive analyzer, or submit your own file for analysis.