Malicious PDF — malware analysis report

Static analysis result for SHA-256 d776d44c0f0c2287…

MALICIOUS

PDF

83.4 KB Created: 2021-01-29 15:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6b258cf8da862daa583d83acd2645872 SHA-1: 83e905fed86fec02c8df91f9d8fb35a843664d84 SHA-256: d776d44c0f0c2287d964e625414548bd591d869dec6ec0406b5779efff103a29
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic firings indicate a link farm designed to direct users to potentially harmful infrastructure. While no scripts were directly extracted, the nature of the embedded links suggests an attempt to lead users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/wb?keyword=how%20to%20make%20anything%20in%20little%20alchemy In PDF document text
    • https://cdn.sqhk.co/javomekoru/gczzfha/smith_s_hours_of_operation.pdfIn PDF document text
    • http://kraftmann.su/traffic_moto_3d_mod_apkfkzwp.pdfIn PDF document text
    • https://kanapefa.weebly.com/uploads/1/3/2/7/132740413/1524069.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/egjWGJQ/di_calcium_phosphate_solubility.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/fjhidvg/59577243152.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/ijjfjYS/21930650949.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/jgicgiF/pumon.pdfIn PDF document text
    • http://pro-komp-master.website/battle_of_gods4olor.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/hjvUElY/chromecast_built_in_app_for_android_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/yXhc4Wx/suxamejejololu.pdfIn PDF document text
    • https://cdn.sqhk.co/pipidopowewe/iif4idv/logidipetitizodukexe.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/bypass_frp_apk_rootjunkydkb73.pdfIn PDF document text
    • https://belujewirozem.weebly.com/uploads/1/3/2/6/132681559/72b870dbdcfc.pdfIn PDF document text
    • https://cdn.sqhk.co/dalegoti/zighbKt/jupuxitapesafu.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/xuzed/free_mobile_friendly_email_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/cloud_types_worksheet_grade_3.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_off00010caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAF 5156 bytes
SHA-256: 11e2b9f3d009f05b46b6508e31cec08970daab1f37050b05f5b80ed4eeb375a2
font_01_sfnt_off00011e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E33 10064 bytes
SHA-256: 962581a9fd668e2a866c96255757de349dd1af7e9359dd911da7716ad13c0f80

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