Malicious PDF — malware analysis report

Static analysis result for SHA-256 357c1afa598637b3…

MALICIOUS

PDF

70.4 KB Created: 2021-02-17 01:11:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: edb91ff25c98c9fd0a9e9cc612551267 SHA-1: e087b2e4da7d801d7f0fb2d610c0f8c0e0df6786 SHA-256: 357c1afa598637b39cae4d7cc73f5057b200240bf9e34d76e73f314d7f75e50c
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=tu+poeta+letra+alex+campos In PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/356e5c5f164ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_601151e483e7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445745/normal_600522ba38357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_60238e8e5f10f.pdfIn PDF document text
    • https://buzoxebujodi.weebly.com/uploads/1/3/5/9/135971705/3bb3a.pdfIn PDF document text
    • https://gosabotef.weebly.com/uploads/1/3/4/3/134332229/fabanazapafi.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/temoxumuluru-wilikigotige-fuzofumifeba-fomeluxagekulaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_6029e1b993b45.pdfIn PDF document text
    • https://gebovobavafol.weebly.com/uploads/1/3/1/4/131406715/842818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_60217b745bace.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391024/normal_5fcc087e5543d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_601aebe2bef1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482399/normal_5fcc209f47deb.pdfIn PDF document text
    • https://boxizegovabore.weebly.com/uploads/1/3/1/3/131379280/tidikewegedotejukid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447884/normal_6019901c35c0f.pdfIn PDF document text
    • https://kixixowagixu.weebly.com/uploads/1/3/2/7/132710794/pipixoxebu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5fd111e6e57fc.pdfIn PDF document text
    • https://vatedubajepe.weebly.com/uploads/1/3/4/3/134371970/35a8898e6b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478716/normal_601235b37955e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EA 5096 bytes
SHA-256: a604e21ebaa89579c10c555569e86f95a14d6feb756ff77368f809677a359da5
font_01_sfnt_off0000e828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE828 11332 bytes
SHA-256: b63d13c959c796c78e1efb36e04f5962bd1a68912c79ce47dbf9b5a16db3a897