Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a8eed96883538a4…

MALICIOUS

PDF

42.4 KB Created: 2021-05-15 13:33:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9022117a4b50f04fb81de01bd71a2a46 SHA-1: d5ef6ff8464418ac265ad4b5ffab61596bd86ada SHA-256: 6a8eed96883538a472d9e44154a7892bc5c8786fde6e9332753646c15534ec01
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://netcdn.xyz/app/406889139/coin-master-free-spins-hack-link-game-hack PDF link annotation
    • http://www.brtes.com/images/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.brtes.com/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.brtes.com/images/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://www.brtes.com/images/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://www.brtes.com/images/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.brtes.com/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.brtes.com/images/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://www.brtes.com/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.brtes.com/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://www.brtes.com/images/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://www.brtes.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.brtes.com/images/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://www.brtes.com/images/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://www.brtes.com/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://www.brtes.com/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://www.brtes.com/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.brtes.com/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.brtes.com/images/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.brtes.com/images/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://www.brtes.com/images/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn 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
stream_003_off00004868.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4868 26156 bytes
SHA-256: 7972cd0981e0b52b9495660a3cf89d2e0e3390f7876d8b59142dfb6fa627db02
font_01_sfnt_off00008414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8414 18056 bytes
SHA-256: 5bc30252b20e252a4e4f12754ee6fd7a8bdc905346c0352a18cf9aa56584dd16

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