Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbdc58eb234262f…

MALICIOUS

PDF

73.1 KB Created: 2021-03-09 00:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b9810567b5cfbdf476c812f0aa36f3df SHA-1: 5d0708fe5c0c266779f5de8567ed8e6609d4c88a SHA-256: dbbdc58eb234262f88774c9b9ddce11968e89b3c2d8f616bf82b9729c4a4c436
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous external websites, one of which is `ponafet.ru`. The presence of embedded URLs and the nature of the heuristics suggest this document is designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/123?utm_term=red+chilli+powder+images+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417049/normal_5ff630a72a2c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426828/normal_5fd6cf0aeff38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472486/normal_5fe4fd2ac4d10.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/optiplex_790_diagnostic_lights_1_and_3ebfp5.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/hunger_games_2_full_movie_dailymotion.pdfIn PDF document text
    • http://lg-copyright.com/24993721750h4k3k.pdfIn PDF document text
    • http://tb-films.ru/wuriza11ap.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/sufewirubef8sv7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375073/normal_5fff33cd23bbc.pdfIn PDF document text
    • http://niwizonoleror.mywebcommunity.org/how_long_is_a_game_of_betrayal_at_house_on_the_hill.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/kenmore_coldspot_model_106.511_water_filter.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/80884691171.pdfIn PDF document text
    • http://gokawojop.scienceontheweb.net/63044163489.pdfIn PDF document text
    • http://kobujiva.iblogger.org/bactrim_pediatric_dosing_guide.pdfIn PDF document text
    • http://gelchlen.fun/vopanekafuralin5h08q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409814/normal_5ffeb1e6a5ef6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujisofivo.onlinewebshop.net/surah_baqarah_english_translation.pdfIn PDF document text
    • http://mifojizu.myartsonline.com/alfabeto_movil_para_imprimir_y_recortar.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/salesforce_tester_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/the_isis_papers_paperback.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/sisomes.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/sloan_flushmate_503_replacement.pdfIn PDF document text
    • http://jofifabe.rf.gd/que_es_el_coeficiente_de_correlacion_lineal_en_estadistica.pdfIn PDF document text
    • http://puredaw.rf.gd/14022375319.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_off0000e02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02C 5668 bytes
SHA-256: 786ec18678503b517e4e394ae48d2bcdff6862f5bf853b60730e52834c544cf2
font_01_sfnt_off0000f35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 10208 bytes
SHA-256: 2ef8f94a5f0c9c817a93b4a229bed525d1c51538c0abc92d66ee7999592e3416

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