Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fcff311edf7b91…

MALICIOUS

PDF

91.0 KB Created: 2021-02-05 03:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a065db817dccad31c743b4b75ebf821e SHA-1: e887869427894107e871634a931373511d8e9bc5 SHA-256: 99fcff311edf7b915ccdf6107d9fa846ae06a8bac24fb5aeef347679effa9902
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely to trick the user into visiting a malicious site. ClamAV detected this file as Pdf.Phishing.Trojan, and a machine learning classifier also flagged it as malicious. The PDF's structure and the presence of an external URI suggest it's designed to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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://seumenha.ru/wb?keyword=critical%20mass%20theory%20pdf PDF link annotation
    • http://redpandarecycling.com/fred_hammond_torrents8cpga.pdfIn PDF document text
    • http://mpvideo.org/asclepius_wellness_product_list0hfzs.pdfIn PDF document text
    • http://bigwin-1xbet.fun/apocalypse_world_fr4zu9a.pdfIn PDF document text
    • http://esclick.pro/74593917620ad86z.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/rEckVjh/local_stock_car_racing_near_me.pdfIn PDF document text
    • http://vinnipoh.fun/janukitag0p9j6.pdfIn PDF document text
    • http://forecast.bet/bible_book_in_urdu3alef.pdfIn PDF document text
    • http://topstop.site/dopinotosejusubalozifujyjsc.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/ijiSgif/44011530455.pdfIn PDF document text
    • http://ashotik.space/rokijod2r8gz.pdfIn PDF document text
    • http://gelchlen.fun/mobile_recharge_offers_today_ideabby5y.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/best_instagram_hashtags_for_fitness_modelseuk8m.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/ijjetie/the_lord_of_blackrock_horde_bfa.pdfIn PDF document text
    • http://yatvoyya.fun/the_mister_download_freep84ar.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/V3uk3VR/segidabup.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/furogewllth.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/sesijesule/vimexaxafuwen.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/chalo_chalo_kamalamma_dj_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/ridebosopupagogivopa.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/how_to_make_total_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/beginner_esl_vocabulary_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/gajarivijegum.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/breakdown_voltage_of_transformer_oil_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/62739400437.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/fuzapibiki.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_off000117e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E6 5204 bytes
SHA-256: b43f664aa0cd56fc5974c25fc7b563c6e69a38d78f0954dd2a846b51f0cf61c0
font_01_sfnt_off000129a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A1 12064 bytes
SHA-256: f35e8831502135aeb136b9b47c0de3b2271b828a5ea99880e789a7f22be87a03
font_02_sfnt_off0001505a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1505A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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