Malicious PDF — malware analysis report

Static analysis result for SHA-256 5172a7e0f42f2a0d…

MALICIOUS

PDF

74.6 KB Created: 2021-01-01 13:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d55073c458e929d02917c4dcc8bc7c9f SHA-1: b9a00c14fd32e08a1d5d047b35802e9cdf52caa4 SHA-256: 5172a7e0f42f2a0d00462c43f714fcca25825e0de31e931eef7b2e7e4775b48f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the overall structure strongly suggest an attempt to exploit users through redirection, likely to a phishing site or a malware download server.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/strik?utm_term=the+crossing+las+vegas+staff PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426263/normal_5fa97b47e88c3.pdfIn PDF document text
    • https://wapizorevumira.weebly.com/uploads/1/3/0/9/130969018/2647585.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495860/normal_5fcd9bef15229.pdfIn PDF document text
    • https://cdn.sqhk.co/ripigopes/DQ0gfA4/vintage_frogger_arcade_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412415/normal_5fd7e0013a1cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5fad485676ad0.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/kojakunekebad.pdfIn PDF document text
    • https://lupoxever.weebly.com/uploads/1/3/1/4/131413766/f8fb8c3c83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380382/normal_5fcc38ed079a9.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/cd52f4a4-db6d-44dc-a8f5-5b9fa0c3c5b7/heroics_julia_alvarez_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/software_technical_documentation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4c9826-d35d-405f-aa06-5bd35f8538a9/the_morning_of_the_magicians_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f103377-cf50-43d3-9802-cb5e3d0273ef/47013260799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57f7f4a6-7577-4bf2-962a-10996720b93d/carnet_entretien_hyundai_ix35.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 8

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_off0000e64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64C 5152 bytes
SHA-256: f6e7929f7f06a2a2a4f400dd439113de69006a80e8ce7999a0c27d1aafd8f358
font_01_sfnt_off0000f7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DB 11156 bytes
SHA-256: b2c0e4b7c6b59c171394cda4dee118f7485af15ed5ca940c12f656ba558f7f44

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