Malicious PDF — malware analysis report

Static analysis result for SHA-256 173cbfb939a5852b…

MALICIOUS

PDF

37.0 KB Created: 2021-06-19 20:25:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b87ed3f9d0b8cab8ba17589095bd5be5 SHA-1: 539aca13d676935f3851b7bab4f06f46d3531d67 SHA-256: 173cbfb939a5852b0e05fbb1ed053c3d201bbb3140004ad5b84e5009afca243d
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 0.9886

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 http://netcdn.co/app/406889139/coins-master-hack-game-hack PDF link annotation
    • https://new.minsatulearning.com/__statics/gudangsoal/files/tiktok-free-views_GM835599320.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/get-robux-today_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/tiktok-free-100-followers_GM835599320.pdfIn PDF document text
    • https://new.minsatulearning.com/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3375 22080 bytes
SHA-256: e4ffd2babfae2ccaed3160909c209cd215dff4b6f3a9231108ae450d384707fc
font_01_sfnt_off00006468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6468 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4D 18004 bytes
SHA-256: 0f5586fad8963a3d66dcc08ea216a344d94ecc2f9eb49a7a48818ccd749a571f

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