Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2179798496c52aa…

MALICIOUS

PDF

73.3 KB Created: 2020-12-16 04:18:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a2d31976c8071f75a6cf9e39e2d4d031 SHA-1: 77c0145b64b00ee0718a0b2721e2c3c6cdbabe35 SHA-256: f2179798496c52aab98622dfb938f8fa7bcca859a9cd28c58ab395661858cb43
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or redirection scheme. One prominent URL, 'https://traffnew.ru/aws?utm_term=minecraft+pc+mods+1.+12.+2', is presented as a lure for Minecraft mods. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffnew.ru/aws?utm_term=minecraft+pc+mods+1.+12.+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f89b3abb87e1.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/bugub-zomanokuwovanew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5f9be52f381f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464524/normal_5fcc8fe16186b.pdfIn PDF document text
    • https://nadunetuvopalo.weebly.com/uploads/1/3/4/8/134884029/f4bf6685347.pdfIn PDF document text
    • https://pekireraseg.weebly.com/uploads/1/3/4/7/134720831/lunonoxob_likusepu_bivaladit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_5f9b359c8d49e.pdfIn PDF document text
    • https://vowobonu.weebly.com/uploads/1/3/4/8/134853209/040672781140d94.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/0b735cd5-1392-4b0c-8c50-6cf62e2e0a1e/psychic_spells_pathfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cbdf04b-7669-4542-8324-6b058044edb6/giguwerogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f469d3f1-e4ef-45ca-8a40-7953072db361/fizufir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f36a85fa-b40d-4573-851d-973e987ced8b/gajuziwarumomovegimibesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/027edfa1-1ac1-4adf-8e17-ee5618f7835a/21428152626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47a135a0-d44f-4348-a573-19866e7bf66b/sukhmani_sahib_path_in_english.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_off0000e154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE154 5488 bytes
SHA-256: 0fafaeb1f68f177d3ea6a87c2e9b605129a03c87fe75af54d8e0581b9fdc3cf9
font_01_sfnt_off0000f404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 10696 bytes
SHA-256: 54762b5e197e4f56cee1fa660bb81313929a0f6b51807b989c6945887d3801fc

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