Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a7437187d48a8c…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 12:00:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e7d1a39508da221dc257bc0f003ccfb0 SHA-1: 4735d5155e737e83f82114324d9fbd6678459fce SHA-256: c9a7437187d48a8cf3819b3fca02485941667682ae46fad8af4f27e969ef0770
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 4

  • 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/get-free-spins-for-coin-master-game-hack PDF link annotation
    • https://foc.vn/public/upload/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-lucky-patcher-hack_GM406889139.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_off00004941.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4941 26496 bytes
SHA-256: 1fec617838cba7c2ce728ebb259e55c9c34499492eb94c9ebc0c4364af0ea9b0
font_01_sfnt_off00008689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8689 17884 bytes
SHA-256: 9bf67b2ee87cdcf37b0aaa2d40e70a5836dac1840b9be614bff5a3f1a0edfaa7

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