Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ec0178e3bd2c5d…

MALICIOUS

PDF

62.1 KB Created: 2020-12-21 05:34:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b8b62d3d0225fe4c6b3d781836fd2855 SHA-1: ef95a97cb0c1de318acc9985481c447772b0308e SHA-256: e8ec0178e3bd2c5da0bc79b265e28cc441b95811345cd5a02c1acac533c52ee0
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to a game mod, aligning with phishing or malware distribution tactics.

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/strik?utm_term=strike+fortress+box+battle+royale+mod+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8b64f0e5002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402244/normal_5fa9e94edaad6.pdfIn PDF document text
    • https://pidilamobojuri.weebly.com/uploads/1/3/5/3/135310388/togulalekudoxenijawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f941dd976a09.pdfIn PDF document text
    • https://zoroxazug.weebly.com/uploads/1/3/4/6/134614170/5b04245ee89.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/1fb1143b-94fe-4f1c-9060-db54c3f67f50/titab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fdce88c99b6d37a797ef/t/5fc818e9970db930d9b2dffb/1606949099265/kezewerodalilipogorirapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f69ec9fe-690c-40be-b73f-cb1eda2e0e25/73540660482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/339857cf-55f8-4402-9665-19978b9c3bf7/kinaguvufubolopinojates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c53c28ae-caeb-4ba8-961e-fdc377826084/26684410243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d9bbaf-3f48-4bbf-92e9-bfaeea1bf91d/78942180003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c439a7e-e29b-43d7-9959-8c21e244ec5f/34915706118.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_off0000afd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD0 5664 bytes
SHA-256: 729592f5b349907d4fa9ccc658387c7e839ebc78792892689081af895abf3845
font_01_sfnt_off0000c30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30C 11748 bytes
SHA-256: 6adaab9d296916df1fa5ab9ba4b09a0b58c40f79ed8d1c03a2119d50baf562cc

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