Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fddc6ada1e5bec…

MALICIOUS

PDF

74.5 KB Created: 2021-03-04 23:12:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e98cfcd2212187172b93af702faee3c5 SHA-1: 3b1ec014c262b080af27d5b70c17c6eb9327e69d SHA-256: 38fddc6ada1e5becc2dd7ca257920c8550fdc47cb4149c2bcc413c50fc2308d4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'Yaskawa v1000 manual english', suggesting a lure to trick users into clicking the malicious link. No scripts were extracted, but the presence of malicious URLs indicates a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 4

  • 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.
  • 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://crophysi.ru/123?utm_term=yaskawa+v1000+manual+english In PDF document text
    • http://richmaya.site/you_are_the_universe_experiencing_itself_as_a_human_for_a_little_while_meaningbi03d.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/29551556760.pdfIn PDF document text
    • http://xefawojuj.mygamesonline.org/define_rhetorical_device_literary_term.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450733/normal_5fef888cdab5a.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/the_complete_green_letter_book.pdfIn PDF document text
    • http://axecheat9.xyz/last_of_us_theme_violin_sheet_musicy0gvq.pdfIn PDF document text
    • http://kayikciakademi.com/cardiac_rehabilitation_guidelines_nz7y78i.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/star_wars_galaxy_of_adventures_ahsoka_tano_figure.pdfIn PDF document text
    • http://allieshouseofhope.com/how_to_calculate_dividends_on_preferred_stockol3kd.pdfIn PDF document text
    • http://true-board1.club/gawafolipagitudaxcduq4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_601ad7543cad8.pdfIn PDF document text
    • http://digitaloffice24.ru/brady_tls2200_manuale_italiano1qumg.pdfIn PDF document text
    • http://copyrightnotice-ig.com/extinction_rebellion_nyc_2019f3sqd.pdfIn PDF document text
    • http://toportt.online/united_distributors_pakistan_limited_annual_report_2009blhti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487201/normal_5fd2ea2157f9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404738/normal_6000fa5536da8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dobesogum/blood_red_skies_expanded_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/list_of_si_units_in_physics.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/nevibotamofovebezukivape.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/voxengo_voxformer_vst.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/one_missed_call_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/horse_racing_dvd_game.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/wotogileboz.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/17660073323.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/wawugerepixeruwekevino.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/1070122179.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3E 5068 bytes
SHA-256: 9cadc88080dbe8b706ae85fff2bc49715f0f557ea8dd0aa45ed28fca3d9e4354
font_01_sfnt_off0000ef5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5E 8992 bytes
SHA-256: 1dc50acd2054dd492609bcf52ce616809baa7b0b8e635009e9dde9e802d35ab9
font_02_sfnt_off00010dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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