Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f49f944d72bc1d…

MALICIOUS

PDF

68.8 KB Created: 2021-03-16 11:17:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c53e71f6ab2bc4213fc4ac831593ed7f SHA-1: 8cf77d3b4b421658c9e246d6bddbc038b6ca9b01 SHA-256: c9f49f944d72bc1d524a9a02627e46e5da5a9eedcf19bbac9f2131eef4955360
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL leading to 'baarspo.ru' and disguised with a movie title. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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=a+street+cat+named+bob+free+stream PDF link annotation
    • https://cdn.sqhk.co/foxoxaze/Y6ibhhE/dukuliwunaxat.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/9iinrhd/wadolafukonojogiboguv.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/BhbRhfo/dokefuratimefatiridimoz.pdfIn PDF document text
    • https://cdn.sqhk.co/gizadomoto/e3Uhagd/jelivulimawelu.pdfIn PDF document text
    • http://gobalesevusob.iblogger.org/18387557349.pdfIn PDF document text
    • http://fepemewavitik.66ghz.com/anova_sous_vide_manual_operation.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/gjbiaPQ/ninja_samurai_assassin_hero_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/bKlgjhg/94535996759.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/rhhQQij/nda_exam_2020_question_paper_with_solution.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/jumedemimo/boater_exam_answers_chapter_9.pdfIn PDF document text
    • http://nufufud.epizy.com/97957432933.pdfIn PDF document text
    • http://metamedixepogob.rf.gd/tavabebolowesapagilamuxib.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/45780620721.pdfIn PDF document text
    • http://jotigosi.epizy.com/kifokenoxakoradugiva.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/lalodigitoremebuvawexi.pdfIn PDF document text
    • http://jimogorop.rf.gd/83051480624.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/72825687694.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/bellicum_pharmaceuticals_inc_annual_report.pdfIn PDF document text
    • http://magafamizaz.rf.gd/how_to_become_a_dentist_in_uk_from_india.pdfIn PDF document text
    • http://sonogobujajeva.rf.gd/27069503590.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/horus_rising_character_list.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD118 5264 bytes
SHA-256: 3e595893df7d5ca8a26d50445f04a40050c834c6ca1b3bbe0c9714b12d1306c4
font_01_sfnt_off0000e2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E6 10292 bytes
SHA-256: 558679a5cec4c01050ad088ed8c555660e8c53699635b7359bbef165533239fd

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