Malicious PDF — malware analysis report

Static analysis result for SHA-256 54423ba57b9b3b68…

MALICIOUS

PDF

68.1 KB Created: 2020-12-22 03:25:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b4a495e5b4ec064dced9d38d5927b2a4 SHA-1: 11636a8a16df1e0f9eea44045a10fd13f7b12caa SHA-256: 54423ba57b9b3b68d716def264c5121f113d374662270274e4250b38546d3ec4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?utm_term=mit+admission+application+process In PDF document text
    • https://cdn-cms.f-static.net/uploads/4463543/normal_5fbf269ed5e9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403808/normal_5fdea29e30a72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5fd147c40bbc2.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/f54649e9-3cda-4550-8cf4-59a35a7e91ac/sine_cosine_tangent_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea315ddd-223d-4e53-8ffc-0b3868fc0dc0/gofiresapegusikamezuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dc29297-52c1-49f9-87ee-0b556b29994b/la_migra_poem_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31425dc5-fa88-47e6-b913-6f94e2b62913/97172611766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ace0959-c63a-4bcc-b0c9-93e20a18e91a/34185589174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16db28a-3d3c-4b53-9fae-9df5966825a5/43831085351.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3486312facd59cebc5192/t/5fcce53e05ddc9599d21c25a/1607263556443/65988470545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8f6556b-927a-42f1-a487-40f78e8dfc49/tcu_box_office_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1cd14ee-44a7-4a3e-ba84-1883f556ee32/kogesifezuf.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE49 5224 bytes
SHA-256: 265f0d7b4f4fa75f541a877d772424ff501a83431d4217ee4270d06816783fe3
font_01_sfnt_off0000e002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE002 10480 bytes
SHA-256: 69eda10c6240bdfce58320ab9a4290bd2b4e1e5840e5bfb9e45ac66afc6f81a6

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