Malicious PDF — malware analysis report

Static analysis result for SHA-256 742efe401af27936…

MALICIOUS

PDF

76.6 KB Created: 2021-03-23 13:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d8e4b0f73b028fd48aca1efbc338020c SHA-1: 0fc4f203507f136dfcb5a045393bc6d1db254fe9 SHA-256: 742efe401af279368e1eaaa68c18c73cae181bbdf1113367c1b6d3c7fe496c02
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The presence of a URL with a 'covid death numbers' query parameter indicates a lure to attract user clicks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://xezojetit.ru/strik?utm_term=covid+death+numbers+usa+by+age PDF link annotation
    • http://fevozogu.iblogger.org/examiner_report_edexcel.pdfIn PDF document text
    • https://vanizubifimid.weebly.com/uploads/1/3/0/8/130874516/kadajurilazo.pdfIn PDF document text
    • http://zolidunepojew.iblogger.org/niledidekejupe.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/GqtifbI/pickaxe_terraria_list.pdfIn PDF document text
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/xovunilejepaz_nomowapabu.pdfIn PDF document text
    • https://mivagori.weebly.com/uploads/1/3/5/3/135318233/9e7085981e7a3a0.pdfIn PDF document text
    • http://timujegewaverun.22web.org/sorebiwawuniwa.pdfIn PDF document text
    • https://mepodatadun.weebly.com/uploads/1/3/1/4/131452799/kojufitoj.pdfIn PDF document text
    • https://cdn.sqhk.co/ximirujusuxo/hhgvhxk/fortress_under_siege_hacked.pdfIn PDF document text
    • http://sifulodidikit.22web.org/8th_grade_spelling_list.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoletef/VtoLJij/hello_beautiful_body_wash.pdfIn PDF document text
    • https://dugesadodi.weebly.com/uploads/1/3/1/1/131164249/524115.pdfIn PDF document text
    • https://cdn.sqhk.co/buwowunuras/giifjbH/glass_bottled_water_delivery_nyc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448100/normal_60443e66e1a68.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/jj2NijC/stickman_fighting_3d_crazy_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_601ad7543cad8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_e9ca7fc4664b4196a27d3ca60adb2faa.pdf?index=trueIn PDF document text
    • https://8319d365-0190-44ee-b2f3-e76f6fd230eb.filesusr.com/ugd/112488_3bb499fd0d9e45de933a010f2fb4d093.pdf?index=trueIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_bf7f005c94694d4799d0d851eab9e727.pdf?index=trueIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_0b544bcd3312426ebf0017d209d2bf65.pdf?index=trueIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_587d248eff234b8fa6a69f5e8d20edff.pdf?index=trueIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_8e084ef7be814aa18f0ddd4c0deaf1c3.pdf?index=trueIn PDF document text
    • https://d1b6b380-f15b-462b-86b5-0b089ba7d90d.filesusr.com/ugd/f99a33_10f95314a6f4476a9aabcc0e39b680b2.pdf?index=trueIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_5b8ba31a7e1141ca8f89c6f55490bcbd.pdf?index=trueIn 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_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 5412 bytes
SHA-256: ca0cb8e4cbd64836f26453d724ec310a199499333f39c2d9e08200ff51ee0ccc
font_01_sfnt_off0000fc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC15 11484 bytes
SHA-256: 1f9f2653499cd3450741cfc7eb2b686409c481cda40cd9baca0c73fbbe487c48