Malicious PDF — malware analysis report

Static analysis result for SHA-256 f53e4397c2c6eefe…

MALICIOUS

PDF

102.3 KB Created: 2021-04-23 10:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4e67d5314e4eaecf6b04a8d8e4e87e22 SHA-1: e268b7bf2e8dc7db4657786e98fb83d94987e6ab SHA-256: f53e4397c2c6eefe76a879d2c6ee2cbd163a66d617e5f09b12c34dbf1a76305f
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 0.9998

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://golowaki.ru/strik?utm_term=mechanical+assembly+drawing+examples PDF link annotation
    • http://tezoxefakalexo.sportsontheweb.net/how_to_use_a_knitting_loom_to_make_socks.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/cFgijgj/cricket_game_all_information_in_marathi.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/lenguaje_musical_ritmico_2_ediciones_si_bemol_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/bieijVP/42211554547.pdfIn PDF document text
    • http://pibarulajido.getenjoyment.net/vizio_sb3820-c6_38-inch_2.0_channel_sound_bar_manual.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/ramipadadefenure.pdfIn PDF document text
    • https://cdn.sqhk.co/donaxewon/jbgeTES/the_fitness_freedom_flow_oudenaarde.pdfIn PDF document text
    • https://cdn.sqhk.co/botuvawezej/gcYTich/wamolunuxu.pdfIn PDF document text
    • https://cdn.sqhk.co/wafasojudo/AFMBCjg/same_day_cash_loans_app.pdfIn PDF document text
    • https://cdn.sqhk.co/sazobenapur/ggAsggT/baby_manor_baby_raising_simulation_home_designer.pdfIn PDF document text
    • https://cdn.sqhk.co/fanoxozowupe/kbhbchf/72277098890.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/24378104356.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/je3Cidy/88514382142.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/i08Hjhf/66702877284.pdfIn PDF document text
    • http://gopagafab.medianewsonline.com/wunusojiserenopefufu.pdfIn PDF document text
    • http://bigijawiv.scienceontheweb.net/ziziwogunosuwaje.pdfIn PDF document text
    • https://cdn.sqhk.co/kodivitedi/ghrR9ua/seaworld_simulator_ride.pdfIn PDF document text
    • https://cdn.sqhk.co/vutazekerubu/hjagiij/satie_gymnopedie_no_1_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wokarodefi.onlinewebshop.net/52322874923.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CDE 5896 bytes
SHA-256: aafd1739a3f5fd360e1faff679a48cbcc6eec29c8295c53505b1cbbcfe9d5e99
font_01_sfnt_off000150e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E5 10952 bytes
SHA-256: 27a2319444f6dc53f96bb72eac156a6371646843e5abeb45ba91ab8c97404c35
font_02_sfnt_off000176c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176C4 16172 bytes
SHA-256: 526177ef816c6165251276cba9d37c9cde58c758a098f93fabcc535992017e36

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