Malicious PDF — malware analysis report

Static analysis result for SHA-256 b211d4c20f4fe348…

MALICIOUS

PDF

62.3 KB Created: 2021-02-18 20:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a5adb798618dda96a8d6f58d1d6a7a0d SHA-1: 36c0be7aeb2fd4dd7d35a687df56a3f551b24032 SHA-256: b211d4c20f4fe348303b77865504d34f1b730b37d28afbabe1d20e8778ecac7f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wix?keyword=thick+legends+script PDF link annotation
    • https://tufemetu.weebly.com/uploads/1/3/4/8/134887907/4f51e.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/Wgcidjh/35369519850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_60255fc0ece5b.pdfIn PDF document text
    • https://cdn.sqhk.co/xupebasolaw/XihjcCD/14546880545.pdfIn PDF document text
    • https://kodidorimo.weebly.com/uploads/1/3/1/3/131380292/5207523.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/galigitilebuwezo.pdfIn PDF document text
    • https://gurugurib.weebly.com/uploads/1/3/1/3/131384113/23d72dfbd30bf9.pdfIn PDF document text
    • https://somomakimemabox.weebly.com/uploads/1/3/2/7/132741269/nowato.pdfIn PDF document text
    • https://wusaveverafojiz.weebly.com/uploads/1/3/4/3/134338410/tudogu.pdfIn PDF document text
    • https://fuwupizur.weebly.com/uploads/1/3/5/3/135390256/rujokaf.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/Hhiprjh/toca_life_town_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzekofuwe/Fhh2bge/pabafidorudogema.pdfIn PDF document text
    • https://xuredetinumimo.weebly.com/uploads/1/3/4/6/134630251/lububasazavutap.pdfIn PDF document text
    • https://motetokazifizi.weebly.com/uploads/1/3/4/8/134885494/4612953.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jogakedom.epizy.com/laguliburovoromi.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_off0000b8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C1 5136 bytes
SHA-256: af1b17575c011a34743c1fd51947a5837b41636f2f3e794387db82eff4205d04
font_01_sfnt_off0000ca3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3A 10148 bytes
SHA-256: 597fc664719717efe6be20c34cd9b704a438e8dfadd306eb6b048004841a0973