Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9732b5c75b25fe0…

MALICIOUS

PDF

76.7 KB Created: 2021-04-01 16:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 209206e25df2377e44b6482f58ae3cb7 SHA-1: 6aee499c09266f8c197f8538353cc7b4bd0f4770 SHA-256: f9732b5c75b25fe02753ea81ffd3b922b7f339f303aa9746bc77f823402987b4
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to suspicious domains, and heuristic analysis indicates it's a link farm on disposable hosting, flagged by ML and ClamAV as malicious phishing content. The document body, though heavily obfuscated, contains text related to 'bancassurance' and 'pdf', aligning with the lure. The presence of external URIs suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/award?keyword=importance+of+bancassurance+pdf PDF link annotation
    • http://xulazawelinuze.scienceontheweb.net/ampeg_scr_di_cab_sim.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/Hjgfihz/consolidated_theatres_kapolei_16_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/lenufetimop/grcjjge/80100615229.pdfIn PDF document text
    • http://nudazemuxebabu.22web.org/78995985746.pdfIn PDF document text
    • http://mamivadusijuf.iblogger.org/pilifob.pdfIn PDF document text
    • https://jukikekiku.weebly.com/uploads/1/3/1/4/131453151/905b02f858eac4c.pdfIn PDF document text
    • https://cdn.sqhk.co/badexejos/hf5ibhj/6502823057.pdfIn PDF document text
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/918006.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/jj8gjaD/tuvavumuxiku.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/fusopoxipo/aptitude_test_sample_paper.pdfIn PDF document text
    • http://releboxodaw.rf.gd/castrol_magnatec_5w30_a5.pdfIn PDF document text
    • http://ritumogadoj.onlinewebshop.net/jexuvewajigokevitonagu.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/xopimofir.pdfIn PDF document text
    • http://wugetad.myartsonline.com/arthritis_uk_back.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/7953475553.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/lg_inverter_v_swing_not_working.pdfIn PDF document text
    • http://tawenaxogiminax.epizy.com/protocol_clarification_letter_template.pdfIn PDF document text
    • http://samowegepor.rf.gd/wupaxamavoge.pdfIn PDF document text
    • http://lanotiwigizoxep.epizy.com/chocolate_movie_tamil_hd.pdfIn PDF document text
    • http://jibapasugaxelo.epizy.com/fijux.pdfIn PDF document text
    • http://puwegazin.rf.gd/how_to_connect_hp_officejet_4652_to_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/new_bengali_dj_song_2018_free.pdfIn PDF document text
    • http://zekilope.rf.gd/central_park_new_york.pdfIn PDF document text
    • http://lawazujazigefon.epizy.com/baxosemavetexewumodotozi.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_off0000ef7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7C 5344 bytes
SHA-256: e3171306b7419ea29ad02f0fee2904890cbc4463403eeacb323eef5e0dfee12f
font_01_sfnt_off0001018b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018B 10528 bytes
SHA-256: d8a38a0cced6f4e3e932170ce9005fcd14931e593d38934828044853499e6404

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