Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f006df3f8a2c2ae…

MALICIOUS

PDF

80.8 KB Created: 2021-03-26 13:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 142501931690b915dba08ae6ccaa3293 SHA-1: e9d5d3331266bc81dbe0ae6b127c216f257e4544 SHA-256: 1f006df3f8a2c2aefd242aa4d76c8a7419f89b934a2f135fd2aa675b2898d847
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier also flag this file as malicious, specifically as a phishing trojan. The embedded URL 'https://ponafet.ru/award?keyword=byculla+to+bangkok+pdf+in+marathi' is the primary indicator of a potential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=byculla+to+bangkok+pdf+in+marathi
    • https://lujonojezim.weebly.com/uploads/1/3/4/5/134588784/wusepukikina-tezet-zibonib.pdf
    • http://doruguduku.iblogger.org/funuwamufetu.pdf
    • https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/kopefo_lafajodidop.pdf
    • http://aydym.club/levutiberorixuxidqhg5j.pdf
    • http://fruitnaturs.space/bofowotifulazixpgafy.pdf
    • http://bikejesoxatelo.mygamesonline.org/dosha_quiz_free.pdf
    • http://submonster.xyz/80798502641lni97.pdf
    • http://gazajujana.mygamesonline.org/anaerobic_respiration_fermentation.pdf
    • http://korixoludofuguk.scienceontheweb.net/libro_el_bogotazo_memorias_del_olvido.pdf
    • https://ledobosu.weebly.com/uploads/1/3/1/3/131383424/tolarader.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sebunuzu/bonbon_cakery_2._0._2_mod_apk.pdf
    • https://s3.amazonaws.com/bufipevuril/23795966065.pdf
    • https://s3.amazonaws.com/kopisigapub/party_celebration_images.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/how_to_install_ink_cartridges_in_hp_8620_printer.pdf
    • https://s3.amazonaws.com/suzixegazunow/monsoon_annual_report_2017.pdf
    • https://s3.amazonaws.com/fuwawibu/mipebisuwuwinedujo.pdf
    • http://lerumedinopox.onlinewebshop.net/46450760545.pdf
    • https://s3.amazonaws.com/bajuse/narasimha_naidu_telugu_movie_naa_songs.pdf
    • https://s3.amazonaws.com/wujanozo/agri_coaching_chandigarh.pdf
    • https://s3.amazonaws.com/gogoxowiniza/manual_usuario_toyota_auris_2008.pdf
    • http://sabarudijavu.epizy.com/tomirufarisanedimetip.pdf
    • https://s3.amazonaws.com/safenalavojuwu/fce_speaking_test_sample_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb15.bin
4c7cc39ee585a451b1b1793ee5322276c93333e0d83c27547a4cf2a891995bb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB15 5508 bytes
font_01_sfnt_off0000fd9c.bin
fadfffa1d99e143c640abdb8633836b9b3362261c2c882e2649a741ee34fda5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9C 12788 bytes
font_02_sfnt_off00012793.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12793 4324 bytes

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