Malicious PDF — malware analysis report

Static analysis result for SHA-256 87125f366e54ba05…

MALICIOUS

PDF

75.6 KB Created: 2021-02-16 13:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f4e814f3fae50db47b05d91add80c681 SHA-1: 29341761e9a35219c8b7868bc9dd6ee768567f9b SHA-256: 87125f366e54ba05ae44603bf9de826decf710f695f97bacdea28fcb322ceeb5
126 Risk Score

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=how+to+describe+a+logo+for+trademark PDF link annotation
    • http://kind-insta.site/istvan_meszaros_beyond_capitaluhvhn.pdfIn PDF document text
    • https://tanofome.weebly.com/uploads/1/3/5/3/135316841/rosorekagerowag.pdfIn PDF document text
    • http://najapizarut.22web.org/nalibasawenilexin.pdfIn PDF document text
    • https://betunujaxub.weebly.com/uploads/1/3/1/6/131636576/5056017.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/jgi3hhl/aquarium_fish_for_sale_online_canada.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/3435772.pdfIn PDF document text
    • https://werobezukivipa.weebly.com/uploads/1/3/4/3/134337965/39ed4fdf6eff.pdfIn PDF document text
    • http://axecheat5.xyz/woh_pehli_baar_jab_hum_mile_song_downloadkabha.pdfIn PDF document text
    • http://reduslim-officialsite.site/colon_cancer65g1s.pdfIn PDF document text
    • https://majotowuwirup.weebly.com/uploads/1/3/5/3/135346036/xagefez.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuluxaja/KWhjhfJ/55575111430.pdfIn PDF document text
    • http://bluebadgeform.com/4576975759ov1bg.pdfIn PDF document text
    • http://faromobipon.22web.org/omas_apfelkuchen_mit_streusel_springform.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/dSe91UT/99688587570.pdfIn PDF document text
    • http://fogugevup.22web.org/california_food_handlers_test_study_guide.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/voropa/worksheet_maker_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/h_m_bedding_size_guide_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/76749730738.pdfIn PDF document text
    • http://sebenakerutat.epizy.com/sherlock_holmes_300mb_dual_audio_movie.pdfIn PDF document text
    • http://kutadomirezo.rf.gd/xepaxexizebukulati.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_off0000dbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB1 5280 bytes
SHA-256: 3b6d84c60f61a835bdfcdec3f9c4d314400eb24e4c426420e697b2d363b44940
font_01_sfnt_off0000edbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 10940 bytes
SHA-256: 4beef3b97054722c1d3b853d2f81750a039dd5078220439ebcdb1ed29296a0bf
font_02_sfnt_off00011312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11312 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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