Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc9d26c3da46d45…

MALICIOUS

PDF

73.3 KB Created: 2020-11-25 12:08:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d743436d48bef6aa6e03d1e18473ce0f SHA-1: b900df49b143951f1534c0b5fc13d00fc77d1965 SHA-256: 5cc9d26c3da46d45455b02954cf7f9eba87114eea5ab4fc9051657d7d57f3b58
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://gettraff.ru/strik?utm_term=the+twisted+ones+read+online+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388629/normal_5fa5ebe6e520f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5fb9d773aad31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_5f96a49b5842a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391649/normal_5faf9214c331c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414167/normal_5fa905db10788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5f8f8ee0cd163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386830/normal_5fa10bd6d73d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5fa42cd43e875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389104/normal_5fb2679f39539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465703/normal_5fb2e28d4828d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_5fbad3ec77aca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5f8e00d5eb941.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65ce46e-4cc6-4ad6-9f17-23cc7daa0399/cara_membobol_wifi_zte_corporation_dengan_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/sonic_the_hedgehog_movie_2020_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/southeast_region_usa_natural_resources.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_off0000e35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35C 5036 bytes
SHA-256: c58c628233225a8ccc5f6e6da57abbd301b0769f95d111e34abf21e21cb4681f
font_01_sfnt_off0000f483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF483 10452 bytes
SHA-256: fbc15f3b08e64c8972698bd682ff5b885cf1ad06357d84ca81f5b01f29780362

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