Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eed5cc497f14540…

MALICIOUS

PDF

78.2 KB Created: 2021-03-19 21:51:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ee5ddcfae4e766e316b6d1c6540de634 SHA-1: 3a859194a6e1006164f71bb278ab92e82b9daf39 SHA-256: 1eed5cc497f14540e5aa3eb60c4c9979b484d5cdb07d2654480c60360839f5a7
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://fokemale.ru/strik?utm_term=12+types+of+tenses+with+examples+and+formula+pdf PDF link annotation
    • http://sinomefonok.mywebcommunity.org/pixabuli.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/riders_to_the_sea_sparknotes.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/contoh_soal_dan_jawaban_akuntansi_dasar.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/42961332934.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/wiguribazukapibatos.pdfIn PDF document text
    • http://bepifukikuku.mygamesonline.org/20225656209.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/dhcihjc/vabuxarolulewelarawe.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/simarimimosaz-walirugutotima.pdfIn PDF document text
    • http://mumijivamivaxij.medianewsonline.com/waposaka.pdfIn PDF document text
    • http://wupevijijoze.mygamesonline.org/wenikamikuserap.pdfIn PDF document text
    • https://cdn.sqhk.co/feruwapusux/gQ4nv95/norusajejewix.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/fopefibiduriralimawepefe.pdfIn PDF document text
    • https://cdn.sqhk.co/zurajekiviw/jgij7ii/nighthawk_carbon_monoxide_detector_manual.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/run_on_sentence_worksheet_key.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/how_long_it_takes_to_study_for_usmle_step_1.pdfIn PDF document text
    • http://miwuzobi.sportsontheweb.net/fupaniwub.pdfIn PDF document text
    • https://bubosetew.weebly.com/uploads/1/3/4/5/134515161/047a119c955c35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jikafazasakojob.epizy.com/hodder_gibson_model_papers_answers.pdfIn PDF document text
    • http://xilibosukotijob.epizy.com/sibomoramudetovamibek.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/baptist_faith_and_message_2020.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_off0000f133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 5632 bytes
SHA-256: f3c022b0a3c2f691e4bbaa129694b1dce062bac9f6b71f322128bda73e2757a9
font_01_sfnt_off00010452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 11532 bytes
SHA-256: 2037853971795445650b607af990a8478fd2064f9bf2a2e718b3e37afc09bd8c

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