Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a52d225c2abc5a1…

MALICIOUS

PDF

64.0 KB Created: 2021-04-29 15:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f86ba950c0efb29e6bae56fb1d89b03a SHA-1: 50da9f8a0ac19a0b77cf11473c1c51767f776114 SHA-256: 4a52d225c2abc5a1b627e860b4792707e90dcc2f3bd16201fb60aab7b0412996
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 0.9263

Heuristics 4

  • 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
  • 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://midufefew.ru/strik?utm_term=gogo+sport+scooter+charger PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459624/normal_5fe59e7e137d9.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/bhagavad_gita_nguyn_ngha.pdfIn PDF document text
    • http://jakusavu.sportsontheweb.net/tujudom.pdfIn PDF document text
    • https://pawunotapi.weebly.com/uploads/1/3/1/4/131408062/dusajodijagidazuda.pdfIn PDF document text
    • https://cdn.sqhk.co/firataxoworo/iagc8gi/data_sheet_2n2222n.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/igjaPji/chocolate_cupcake_recipe_without_eggs_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_602f93912420d.pdfIn PDF document text
    • https://rujogapojepon.weebly.com/uploads/1/3/4/5/134597846/3406014.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/62jjhiA/70811375077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_6064bd7c91689.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/bible_study_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490752/normal_5fed742c0140f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_606bd8f430289.pdfIn PDF document text
    • https://vabinori.weebly.com/uploads/1/3/4/3/134348027/c05a5fc6b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529024/normal_6001429687d3e.pdfIn PDF document text
    • https://jojurofi.weebly.com/uploads/1/3/4/6/134666092/kisatopanipagudag.pdfIn PDF document text
    • http://dakekunagefasak.sportsontheweb.net/xetewumajanawudeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498348/normal_602d73a83efcf.pdfIn PDF document text
    • http://mavixepajifulem.scienceontheweb.net/denazirogaxoxo.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/lebaxa/ketogene_ernhrung_lebensmittel.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/jinonomabidozu.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/good_morning_image_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/loneni.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29E 5192 bytes
SHA-256: 7613f668eec967dd540c54ec7aab9b346cc8b0024010974f34e21cbe5a345de4

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