Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad98a0a286d37811…

MALICIOUS

PDF

77.7 KB Created: 2021-03-27 22:09:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0b9b08633bccf0afa82b4f9d6df255a5 SHA-1: 2e3812138d1fc818b7b3718d9d904bbe9f761ad7 SHA-256: ad98a0a286d378113d5fa0e8ef868a98448348013b8932ee588c206081387c37
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, including one pointing to 'mezovuduw.ru', suggesting it's part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to 'biopsychology pinel pdf free download', likely a lure to encourage downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=biopsychology+pinel+pdf+free+download PDF link annotation
    • http://relibafogat.sportsontheweb.net/6590104716.pdfIn PDF document text
    • http://zusagukitu.mywebcommunity.org/kawenaviji.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/jj8idha/zidak.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/7432830987.pdfIn PDF document text
    • http://nebofonuve.mywebcommunity.org/analyse_2_intgration.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/eNwoBET/speedometer_fortnite_chapter_2_season_4.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelemusib/iaIMbvZ/genikivudasife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_3a98876dbf9643dc9df2b059101b5935.pdf?index=trueIn PDF document text
    • http://tafiwepamubov.atwebpages.com/how_do_you_fix_a_dripping_water_faucet.pdfIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_943a72069054475f992df946e05cf311.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b6ebe5d-89c4-4c5f-bfe4-ae40f7769dc5/fesijawiruvotulozixape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6efa0e4-5c2e-4ad2-a929-9e4e23a6dd1d/vizebikudesubeloduxiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c349c7c-79fc-4c0c-9fb4-0d9380f204be/movie_maker_2012_free_download_for_windows_7.pdfIn PDF document text
    • http://segimoto.myartsonline.com/jojubemivupabogakebov.pdfIn PDF document text
    • https://ac911ccd-a574-46a9-bbb3-57bb927ff796.filesusr.com/ugd/2735c9_3f86538425444fc0b15d67e3f9129a1a.pdf?index=trueIn PDF document text
    • https://9c50f6df-e9c1-453e-a208-eff1cefe231f.filesusr.com/ugd/44b3dc_1fc07d80051046238de58ec636eee48b.pdf?index=trueIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_12343d940c334a67a1d5a0979cec78b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/855f7308-6bb8-4327-a125-73b5aa301c24/what_does_2_beeps_on_a_computer_mean.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/42897205077.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_off0000e781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE781 5660 bytes
SHA-256: dd68afedf46388cebbc4d23c4d10ba2a27d60d1c90d3d2a59a6902e4f7ef1e57
font_01_sfnt_off0000fad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD3 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10361 10928 bytes
SHA-256: f6a5fe7bcd102d385991b8dac3c114ef5dc55f2875ab4ff960e8d7d206f2b55b

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