Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eae9fa6c63458ac…

MALICIOUS

PDF

71.3 KB Created: 2020-12-16 16:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ab4cc63d0844668f3f0536e92a530e63 SHA-1: ea1e42a9e515e8e41de3d44157aa6f335d650c05 SHA-256: 6eae9fa6c63458ac7eb0363213e08647331c5bdfcf6f5335a731178f771dc384
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic PDF_SEO_LINK_FARM indicates a link farm, suggesting the document is designed to drive traffic to external sites. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its deceptive link structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://ggtraff.ru/123?utm_term=aegis+legend+mod+colors In PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/1171588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443802/normal_5fa324e0d5143.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449973/normal_5fcfae7576fb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393348/normal_5fb2a1c569413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393639/normal_5fd120cb7b984.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414334/normal_5fc40bc67ee50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417537/normal_5fbc0aab7322c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5f88f15746936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469103/normal_5fa37c88c6fc2.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/96d381a2-4b30-4f82-9af4-0cb420917058/tezuw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5947bc6d964583641de38/t/5fd60521df2f0204c22c2364/1607861538173/256697679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a0f1a3-14d7-4fec-b6e7-6f556f0dcb0b/google_sheets_5e_character_sheet.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_off0000d9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B5 5036 bytes
SHA-256: 8f4444bc4af91278b91e472238f3248ac3c563a30b073bcdb1acffbd668e2a22
font_01_sfnt_off0000eac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC7 11064 bytes
SHA-256: 0d42e290ff145d70afd0cb37bfc15a13380037e3e3beea263d0202cbe69e4b92

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