Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a8388ca6e642014…

MALICIOUS

PDF

75.2 KB Created: 2021-03-19 12:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3b791601bdee78a8063c2167dabe435d SHA-1: 5253bf0cd42aee6ee739b26eec0a99f61fcea106 SHA-256: 6a8388ca6e6420141cb812f0b1885c154fcdfd16172b430816795791aac31c42
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document exhibits characteristics of a social engineering attack, specifically a 'ClickFix' variant, by instructing users to execute commands. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://ponafet.ru/123?utm_term=cara++driver+bluetooth+windows+10 PDF link annotation
    • https://jinafoxibufesow.weebly.com/uploads/1/3/5/2/135293268/5323149.pdfIn PDF document text
    • https://lirefabagobaxi.weebly.com/uploads/1/3/4/0/134012393/599331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_6030d65e0ba12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424347/normal_5ff62b70cfb8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452588/normal_5ffba4a1c46c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_601f11ecd0c83.pdfIn PDF document text
    • https://cdn.sqhk.co/latusetime/5MXhdih/vast_tv_everywhere.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/gjbSlib/21167846896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473445/normal_60343b2c7eebc.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/lasabo.pdfIn PDF document text
    • https://zonanasuwovu.weebly.com/uploads/1/3/2/6/132683154/segakokumija_nasutapevopas_rogejekijarupen.pdfIn PDF document text
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/0f8900.pdfIn PDF document text
    • https://kapokifi.weebly.com/uploads/1/3/4/5/134510442/kexez.pdfIn PDF document text
    • https://kuwepokipeluzil.weebly.com/uploads/1/3/0/9/130969114/9033381.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403687/normal_5ff64ae8aca66.pdfIn PDF document text
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/lizazow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416654/normal_6005c5d6a5ec6.pdfIn PDF document text
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/nulewab.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_off0000ea2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2F 5304 bytes
SHA-256: 4b4d4a0f21ef87a9d19959f0c2681e0a324f4ae40989fab7a717b93c30e078d6
font_01_sfnt_off0000fc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC45 10328 bytes
SHA-256: 74ed04fcf82236b0b8b5640b32c910165e3b0a295650f83034c005281b14b23e

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