Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed64dd59e8e4e4d…

MALICIOUS

PDF

86.1 KB Created: 2021-02-19 19:06:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0b889da71d08d4b69a19619b324c845f SHA-1: d860a92648e0b706a2a9735caf7bd1f3c79d487f SHA-256: bed64dd59e8e4e4dfc19c0cea271184fe9c62542713c39dd24aff3ed7720d5d9
156 Risk Score

Malware Insights

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

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 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/strik?utm_term=the+real+little+mermaid+story+scary PDF link annotation
    • http://fajutixosisi.22web.org/fojidineroxabup.pdfIn PDF document text
    • http://xanimupa.22web.org/bollywood_old_song_status_video.pdfIn PDF document text
    • https://raponomipa.weebly.com/uploads/1/3/2/6/132681826/2070060.pdfIn PDF document text
    • https://defuboxuzunusam.weebly.com/uploads/1/3/3/9/133986960/tesoxomanusu.pdfIn PDF document text
    • https://vabakapis.weebly.com/uploads/1/3/1/4/131453405/88464b88147b8f6.pdfIn PDF document text
    • http://nadovadu.iblogger.org/cardiac_catheterization_handbook_kern.pdfIn PDF document text
    • https://luzafoku.weebly.com/uploads/1/3/0/8/130814295/sidiwuzuvazum_dexabedajo.pdfIn PDF document text
    • https://viriparerari.weebly.com/uploads/1/3/5/9/135978168/zikuridezaz-sexodufetotit-rimedemanujuve-natipixafun.pdfIn PDF document text
    • https://wirosumarot.weebly.com/uploads/1/3/1/3/131398493/5710572.pdfIn PDF document text
    • http://nimened.66ghz.com/7362327062.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/busutafitufe/hp_2000_bios_update.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/minecraft_pe_herobrine_mod_apk_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/todoted.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/64829021945.pdfIn PDF document text
    • http://retelowanudugut.epizy.com/48012938912.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/18251089643.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/67883205515.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/befunky_editor_de_fotos.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/executive_personal_assistant_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/kadixekerebofenane.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_off0001136f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136F 5228 bytes
SHA-256: fbb8f7a04438afff9eefd3b431c67ff96716695831e9c31af45d1fc65b455b71
font_01_sfnt_off00012512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12512 11104 bytes
SHA-256: deb1f52f1a5850f6945ad34b010e606467bb9d9d31134982499be0f57590aeaf

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