Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e1b73501f1b0ef…

MALICIOUS

PDF

61.4 KB Created: 2021-01-04 09:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c9ec25a49cb534bfb12b8581b1055246 SHA-1: efe4efb6c535f8356ea403d077a9b0e99b98d542 SHA-256: 46e1b73501f1b0ef019c3b2b0659791c855664d417d329f22745e3d83aba0348
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links to external websites, including a known malicious redirector. The heuristic firings indicate it is designed to lead users to malicious infrastructure, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit users via malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=minecraft+magic+modpack+2019 In PDF document text
    • https://jiwuzutobaduf.weebly.com/uploads/1/3/4/8/134889186/zumigar.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/uThgidK/wavijewawizumujuziwefe.pdfIn PDF document text
    • https://pevamuwewewi.weebly.com/uploads/1/3/4/6/134636281/51735.pdfIn PDF document text
    • https://wekigenajelu.weebly.com/uploads/1/3/3/9/133999196/640ffd5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5f9b9ceed6f68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489058/normal_5fda8173959e6.pdfIn PDF document text
    • https://cdn.sqhk.co/duxajoje/RHEhdT4/olympics_2020_logo_2021.pdfIn PDF document text
    • https://pazomanu.weebly.com/uploads/1/3/1/0/131069777/ruxurapuj-xoreg-ruteniboxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5fd5f328eeb1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5fbc1167d5fa3.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/iFig50r/walking_dead_final_episode_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tuteremekome/hih9ggD/child_care_aware_sign_in.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_off0000b329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB329 5816 bytes
SHA-256: 3c07735a04feb15ce235a4a8e79f4dce8e0580651b03942fabf139ae11634e9d
font_01_sfnt_off0000c6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FE 9928 bytes
SHA-256: 3c644360ed71b2cf34bf81dd5a3086697ca374f9b68e990ebfee9c1a6bf2356d

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