Malicious PDF — malware analysis report

Static analysis result for SHA-256 273d3e616b68a05e…

MALICIOUS

PDF

75.3 KB Created: 2021-02-27 04:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ccef07ced10fe710ce2f4e237197b414 SHA-1: a096a898a0c9f649ef50a3b943604c0dd4dc31e0 SHA-256: 273d3e616b68a05ebb3c712e6f678fea13309b773ee83c48b5dd7add7a68f480
126 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs, with a high concentration on disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to redirect the user to a malicious site for further exploitation.

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://lozipotod.ru/award?keyword=find+your+why+summary PDF link annotation
    • https://wugovokida.weebly.com/uploads/1/3/4/3/134319073/duvitol-mizumuvakako-rawifuzamul.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/what_is_process_customer_service.pdfIn PDF document text
    • https://cdn.sqhk.co/nakusunegud/HBrjchh/3154992869.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/how_much_money_does_a_mechanical_engineer_make_in_new_york.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/jhjVlij/74944372055.pdfIn PDF document text
    • https://dabesego.weebly.com/uploads/1/3/2/7/132740865/kupivozajas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zoxuditavuvov.rf.gd/9670247954.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/32441716677.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/xomewogimejenegalun.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/notemasobalimiwukam.pdfIn PDF document text
    • http://bafimilatape.epizy.com/google_account_cannot_sign_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/jodas.pdfIn PDF document text
    • http://tojuributesef.epizy.com/jigutivamiw.pdfIn PDF document text
    • http://wevosowenafa.epizy.com/espiritu_de_dios_acordes_facil.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/samsung_note_4_battery_price_in_kenya.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/86597757577.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_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 5184 bytes
SHA-256: 595dd112d20b82febd72af36a900583fb8c2aa19a066d281cce1d0fd539159e8
font_01_sfnt_off0000ff17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF17 9792 bytes
SHA-256: 2130f0e3825e68002727ee2b74ee8e4d0cef5673c7ec262aa02eed18b9e91c34

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