Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bf33f05eafae2b…

MALICIOUS

PDF

90.8 KB Created: 2021-03-22 08:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 53ed7066d8c08bb8d76ec4ccdb5253f2 SHA-1: e258756e16dea1a21863e599126ee177a2a2e4cc SHA-256: 37bf33f05eafae2ba3bdae595a3a0f2267c0d477d0ed62c9e2c300369fc43d79
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=benadryl+injetavel+bula+pdf PDF link annotation
    • http://fegokodelaxen.scienceontheweb.net/area_volume_of_all_shapes.pdfIn PDF document text
    • http://rawenspant.online/midakubogufopilamelabnwg4p.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/adonai_hillsong_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/lupananonutu/Y9Zjjja/complete_abortion_ultrasound_report.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/msjfzjj/bow_master_japan_game_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/iahhiwN/21423722843.pdfIn PDF document text
    • http://genusadnlo.space/706376132673glk9.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/migusegeladudako.pdfIn PDF document text
    • http://4kuhd.me/vatofebogotudaribipayoa4u.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/spectrometer_experiment.pdfIn PDF document text
    • http://zisapawiwako.mypressonline.com/how_does_an_ammonia_refrigeration_system_work.pdfIn PDF document text
    • http://csxmoney.info/how_to_connect_jabra_engage_75_to_cisco_phonehwplu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448328/normal_5ffda5174e0bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485942/normal_5fc7ae40c8111.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/lofabekekigutatunopaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/hbjcGgg/prison_break_season_5_episode_9_trailer.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://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_8d6a92f909434e5ea4123ebb1e2716ef.pdf?index=trueIn PDF document text
    • http://zugepoguj.onlinewebshop.net/wowekojez.pdfIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_461752933b3044ec94c41f7773e2d49f.pdf?index=trueIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_d4eac158303e4c1a80c586911c1ffd16.pdf?index=trueIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_4a8c3d991630467a9d038683086672e0.pdf?index=trueIn PDF document text
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_be997a12e95844b0b5665fb08b625c46.pdf?index=trueIn 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_off000111b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B5 5056 bytes
SHA-256: 2523d68eb25be7751c63ec40ded99f363b6f6f45c187e6881126c559d38cdf25
font_01_sfnt_off000122f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F5 14560 bytes
SHA-256: 422617955e315b8dc3dffe3898eeb75986113c379f8eb45a38bb9440982f3097
font_02_sfnt_off00014e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E3F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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