Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0781c42f08da64a…

MALICIOUS

PDF

64.9 KB Created: 2020-12-18 18:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4b29dc06cf92dccb8624f920cf2d4e83 SHA-1: 9d69dbe0e76837b8dedcd75b1de2a3499b58e32e SHA-256: c0781c42f08da64ab66923695d2f8aa2259f8c2cf9a3aedd255a8bf9b578b760
214 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to obscure malicious activity or distribute further content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/wb?keyword=persona%205%20bicorn%20negotiation%20answers In PDF document text
    • https://vijejomikozo.weebly.com/uploads/1/3/4/6/134668467/b9a1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5540f16f6d44b07dbf651/t/5fcabd299d30902cb76ac4f0/1607122218261/ps_monthly_games_june_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ccba72-77ff-4d7e-b7d8-d48705c82529/wezovabev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb5e2b4-c2e3-43ed-b15b-e674daeb040d/kofegit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08a61e5-f88d-4b30-90b6-8776a422d8e3/roblox_bloxburg_discord_servers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b20e80-3dea-4ca0-b6d1-7c5d51eb56d0/tutuledujexexutepixidi.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/equations_and_inequalities_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc81a80526ad1a5999a26b/t/5fdc9ca58b7a255883269f9d/1608293541759/fevalogolenotuzoz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc563a62cf09257bd89a1ac/t/5fccab3005ddc9599d1d6ad3/1607248690949/elm327_obd_terminal_commands.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/30369841866.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/35373072798.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_off0000c2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AE 5292 bytes
SHA-256: 145f3590619bd11f15c14513721d7d89a8555ef9efe2c9edd5d7993d5a12ae4b
font_01_sfnt_off0000d4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D3 10052 bytes
SHA-256: 9edb4025c7b097640e7384164034f5cdc87ec4b0b36b93ced483f60dd04e2682

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