Malicious PDF — malware analysis report

Static analysis result for SHA-256 3baaa41b1db475cd…

MALICIOUS

PDF

68.6 KB Created: 2020-11-27 12:01:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ed6118732b538b80838133ef07ec29c4 SHA-1: 64a10c497f80d363b79c6706b4ee9f100b597369 SHA-256: 3baaa41b1db475cde3f19a3e63c63d80e60cbdca3b4a96518fe0d3bfd4681103
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs forming a link farm, with one critical heuristic identifying a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and embedded URLs suggest the document is designed to lure users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/strik?utm_term=final+fantasy+explorers+material+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f91fdb784ee8.pdfIn PDF document text
    • https://sexiguviwuzokal.weebly.com/uploads/1/3/4/6/134687255/6044208.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/9030654.pdfIn PDF document text
    • https://vefigemeg.weebly.com/uploads/1/3/4/3/134368147/xorimilavamapiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5f9e38385db1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_5f9a0a1544e8f.pdfIn PDF document text
    • https://xukejexen.weebly.com/uploads/1/3/4/4/134480318/31711c67c5ff7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464534/normal_5fa2f1b19a6d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/cessna_172_skyhawk_service_manual_1976.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/answer_key_ntse_2018.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_off0000cbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC6 5484 bytes
SHA-256: 6cdb3c6aada08ddbd5fa73d4773d316dc25788060a43eeee0a6950b158288545
font_01_sfnt_off0000de71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE71 14040 bytes
SHA-256: 2ec31db7f6bc1a18e3189176b9540ab8592b7c6a0e56335975bb103f09344198

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