Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b7fae1f9c29c51…

MALICIOUS

PDF

81.7 KB Created: 2021-03-03 12:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 99d64e154700713e15281139d1c57f02 SHA-1: 5e25ef24f5c0ad4216bccedb0d11e14843b49dca SHA-256: 96b7fae1f9c29c51aa9f9d63cc3355dc03b20bd925030b9ca7767e3f3532f90e
194 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 high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm for SEO spam or to direct users to phishing sites. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=cisco+sg300-52mp+specs PDF link annotation
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/6148216.pdfIn PDF document text
    • http://gnoogle.site/wing_chun_kung_fu_the_wooden_dummyrquwf.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/U0lV4gf/telemedicine_applications_in_case_of_covid_19.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/bella_vita_salon__day_spa_leavenworth_ks.pdfIn PDF document text
    • https://kosipomorogimel.weebly.com/uploads/1/3/4/3/134307263/sosijutunusujuperawu.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/jjoQhfK/fun_word_games_to_play_with_friends_online.pdfIn PDF document text
    • https://cdn.sqhk.co/logenuzupug/i0vTLjg/lesoraburozeb.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/6151936.pdfIn PDF document text
    • https://fojexoduzasob.weebly.com/uploads/1/3/4/6/134693365/401500.pdfIn PDF document text
    • http://fabulouss.space/identificacion_de_la_conducta_humanawikoh.pdfIn PDF document text
    • https://nasavizar.weebly.com/uploads/1/3/5/3/135322571/01136e9.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/jjcijij/the_diplomat_hotel_london_tripadvisor.pdfIn PDF document text
    • http://manybigs.space/carnatic_music_free_download_mp3_instrumental8dl6o.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/the_game_awards_voting_results.pdfIn PDF document text
    • https://wozepunelom.weebly.com/uploads/1/3/5/9/135993859/7723726.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mixanaz/karuppusamy_kuthagaitharar_tamil_movie_hd.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BF 5412 bytes
SHA-256: 54028d006717c74e6db374a833031065bd765012def1494055ae148fa2923339
font_01_sfnt_off00010832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10832 15428 bytes
SHA-256: 132b6aa26b6ce26fcc1b39f3b31d3506b78e369615d9aa89247077b3703c5041

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