Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9295636d23bb630…

MALICIOUS

PDF

68.2 KB Created: 2021-01-12 04:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5b23caab3a800a2ecaaba839a988949d SHA-1: ab693d7afb6efc07f9943fa08e2544d4855c38fe SHA-256: b9295636d23bb630df4ae045829466fd58eea91e20608087308a2a9c6c91ed93
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to disposable hosting and redirect to known malicious infrastructure. The document body, though heavily obfuscated, appears to reference 'Minecraft chisel and bits mod', suggesting a lure to attract users interested in gaming content. The presence of multiple malicious redirector links indicates an intent to lead users to potentially harmful websites for phishing or malware delivery.

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 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.
  • 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/aws?utm_term=minecraft+chisel+and+bits+mod In PDF document text
    • https://site-1179868.mozfiles.com/files/1179868/12720898431.pdfIn PDF document text
    • https://site-1173584.mozfiles.com/files/1173584/best_korean_bbq_melbourne_broadsheet.pdfIn PDF document text
    • https://site-1166068.mozfiles.com/files/1166068/xelitutadikipazeturives.pdfIn PDF document text
    • https://site-1176402.mozfiles.com/files/1176402/4475069230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5fa800b76bc3f.pdfIn PDF document text
    • https://donaxitod.weebly.com/uploads/1/3/4/6/134688316/e1c05f4859bbf5.pdfIn PDF document text
    • https://site-1084296.mozfiles.com/files/1084296/color_swap_fortnite.pdfIn PDF document text
    • https://regifevadep.weebly.com/uploads/1/3/4/4/134476302/fibafovinemamag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5fb2e04be7047.pdfIn PDF document text
    • https://besukobar.weebly.com/uploads/1/3/1/0/131069863/guxol.pdfIn PDF document text
    • https://jowakalol.weebly.com/uploads/1/3/4/4/134480841/df409b01af.pdfIn PDF document text
    • https://site-1241869.mozfiles.com/files/1241869/63859659385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413968/normal_5fadac5216e86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5C 5408 bytes
SHA-256: f1abbca33f59a5e59cfbfb25fd791de24e1bf9314c75f254b4e7ac40c85ad550
font_01_sfnt_off0000dd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9E 10864 bytes
SHA-256: dfcc94c03f9c80542950b938f47f91acee304608439fc25a28bb965b185e59e1

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