Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5975af562948d94…

MALICIOUS

PDF

68.1 KB Created: 2020-12-20 23:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bd06bd21efca7661e70a86054fe2459f SHA-1: 14caef87aefaea5f065fb0ad04a6ed64e6385e60 SHA-256: b5975af562948d94a13afbd037df0a769bbc5c74bf1bbb67466508be92e8a3c1
214 Risk Score

Malware Insights

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

The PDF contains a link disguised as a "super mario run hack 2020" lure, which redirects to a known malicious domain. The PDF also hosts a large number of external links, suggesting a link farm or SEO abuse tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://cctraff.ru/strik?utm_term=super+mario+run+hack+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4487906/normal_5fae833133cd8.pdfIn PDF document text
    • https://mezobemubuzopos.weebly.com/uploads/1/3/3/9/133997151/8923229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457590/normal_5fb3d6124b757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427077/normal_5fa99c12b423a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f8e6a5889d75.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/8393172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_5f9fa1596ae18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_5fac44c5ec03f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1b53fc6229360ecb2a747/t/5fc856ac13de6e798157646d/1606964909840/accounts_balance_definition_audited.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52140b82-c98c-4e13-b1c9-99eb2efd8bb7/resumen_del_libro_cazadores_de_micro.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9c5f0a190b16b315bd63/t/5fdca5e586e83642141344f0/1608295909628/wto_trade_facilitation_agreement_text.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3660e8787e879897bde4b/t/5fc71bc93d56556d1436844c/1606884297527/nagugodewisovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595c927d-f80e-45b6-874e-9749e3b2b3f2/93707565377.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_off0000cb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB08 5404 bytes
SHA-256: 16d2cebdbaba3e5ce39108162b9c1177336e4036df8538eddba095cad7d17f34
font_01_sfnt_off0000dd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3B 11556 bytes
SHA-256: 9da4016d91ba2119b812362a01e9c6a47984ba51b78d71d47040784afddb5eb9

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