Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c2b29793b819e2…

MALICIOUS

PDF

85.6 KB Created: 2021-03-09 22:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fd97a6aff05919610a8b83c0a1348029 SHA-1: 0cd1b6e6aa1f5f29a5fb1f6e83fbcf3fdfcd1ec8 SHA-256: b4c2b29793b819e20ce3a3239393bbec174826ebdf3bbe1344ac82d50cf6f7a5
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://xajibur.ru/wix?keyword=affidavit+in+lieu+of+originals+oci+form+download PDF link annotation
    • http://kekijojovif.sportsontheweb.net/lepagutifaj.pdfIn PDF document text
    • http://letufemew.22web.org/howard_miller_clock_company_parts.pdfIn PDF document text
    • http://bankrot-biznes.ru/31109893733nrn87.pdfIn PDF document text
    • http://dodajavux.scienceontheweb.net/game_of_thrones_books_reading_age.pdfIn PDF document text
    • http://7lessons.site/pokemon_ruby_destiny_reign_of_legend9e47q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486548/normal_5fee92fa12023.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/mizexadafitosox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427499/normal_5fc836b92b18d.pdfIn PDF document text
    • http://tufepuwaw.iblogger.org/prison_break_quora.pdfIn PDF document text
    • http://tibetterrier.ru/glencoe_mcgraw_hill_algebra_1_answer_key_chapter_3vlz7v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_60217ba3d4ac8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368497/normal_5fe0de7710764.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/22735183139.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414498/normal_6001c76179c34.pdfIn PDF document text
    • http://vogudikomi.getenjoyment.net/do_walmart_cashiers_get_drug_tested.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c74b20f-9623-4df1-95bf-7d05bb584103/rufobofupasopiz.pdfIn PDF document text
    • http://gototura.myartsonline.com/panasonic_plasma_tv_power_light_flashes_10_times.pdfIn PDF document text
    • http://padusij.onlinewebshop.net/hidden_secrets_of_the_bible_history_channel.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/killing_joke_eighties_nirvana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e7718c-d61a-4bb1-acce-4c1b637f8ae9/kijebapeb.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/zewakafamazomigosope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/183c817b-a055-4328-9280-1a45c5b91f29/tippmann_a5_e_grip_red_light.pdfIn PDF document text
    • http://poxabeb.rf.gd/chuyn_file_b_kha.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9aa2266-87fe-4bd6-8ec7-cce3334314f0/what_i_know_for_sure_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473fba66-b8ff-4ff0-b511-a04a20375ff4/how_to_reset_westell_7500_router.pdfIn PDF document text
    • http://fudipakuvile.epizy.com/bozademoben.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_off00011140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11140 5480 bytes
SHA-256: 437a9303c27297a012e340d26eea236df6183739129714ca6ff762eb74e477e2
font_01_sfnt_off000123ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EA 10856 bytes
SHA-256: ccb23ba2d84d12fa7ff35a9550a2ff7e20e7f10ecf7b12ae5034018648faf910