Malicious PDF — malware analysis report

Static analysis result for SHA-256 269e5d23bece23a2…

MALICIOUS

PDF

66.0 KB Created: 2021-03-25 13:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 185480e62ec4e5fa0ce9e669b8fabbd5 SHA-1: 16b996aea975bb99b0f25f1e627adf0ec2483418 SHA-256: 269e5d23bece23a23a886b81c9c9a21283b071a9d7ab3044ac35f6e9ea2d5ff0
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=guided+reading+activities+economics+answers
    • https://cdn.sqhk.co/raxoxawupej/igfNRsk/vavaxapefamozatinoloxoje.pdf
    • https://refitefajo.weebly.com/uploads/1/3/2/6/132683069/borodujajitirol-loxukoxowe-xenezomosov.pdf
    • https://cdn.sqhk.co/muvifisi/hcJXTHx/94475928170.pdf
    • https://kurixaxewa.weebly.com/uploads/1/3/1/3/131383664/nojibuvuduwovet.pdf
    • https://daxivikulogator.weebly.com/uploads/1/3/4/3/134308382/1111390.pdf
    • http://mudixefibewab.mywebcommunity.org/xifinata.pdf
    • http://mamafiposorugul.sportsontheweb.net/bwapp_walkthrough.pdf
    • https://sakixori.weebly.com/uploads/1/3/3/9/133997256/zizoju-supiwanuwaj-rofegawepewo-doluzesukubavab.pdf
    • http://raguvigawak.mypressonline.com/74217748899.pdf
    • https://xowavexinoj.weebly.com/uploads/1/3/1/4/131408618/eb5a0.pdf
    • https://livurexile.weebly.com/uploads/1/3/2/6/132695833/zekonatagezu.pdf
    • http://tejowigasinafu.getenjoyment.net/38985077090.pdf
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/78c3a.pdf
    • http://vaxenovutejuzid.sportsontheweb.net/wings_of_fire_book_summary.pdf
    • https://cdn.sqhk.co/bewewojiwo/3EdaKdg/katedipujikatewiporinof.pdf
    • http://datab.vip/frases_de_la_boca_del_pozo_emelecq0tmi.pdf
    • https://cdn.sqhk.co/sopaluwokaja/gjjqIYh/risk_analysis_tools_excel.pdf
    • http://sunny-web.ru/elite_dangerous_best_keyboard_layoutpvrdd.pdf
    • http://nigma24invest.online/dungeons_2_game_of_winter_guidemoqj1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kisimujuk/american_heart_association_guidelines_for_hypertension.pdf
    • https://s3.amazonaws.com/petuzutemixuvod/live_weather_report_aligarh.pdf
    • https://s3.amazonaws.com/vidadaviwal/amrita_nayak_all_song_odia.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c752.bin
2f8c4febe9168d80fdc457b610207917c7fa07572a22a43e7097a5082ede7db4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC752 5408 bytes
font_01_sfnt_off0000d9b6.bin
a75340077a82ddeecd68f349f0867af8f75fdc0bf8bf8d8ee7ae6ef929c1dca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B6 9668 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.