Malicious PDF — malware analysis report

Static analysis result for SHA-256 495cb7aa49308c82…

MALICIOUS

PDF

35.0 KB Created: 2021-06-25 20:27:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2b5e3dda8f05d82f18357c23f4d9a6a1 SHA-1: 127eff3dcdbaee0c4c0ba081766213be17abf0b9 SHA-256: 495cb7aa49308c82603d2e05b16b43b27fdb57780ca3eb581bcad43953f71238
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 0.9980

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/431946152/free-robux-download-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-hack-sur-pc_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-name-that-famous-character-cheats_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/robux-miner_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-hack-anti-ban-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-bee-hive-simulator-how-to-get-a-free-egg_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hacker-egg-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/oginject-co_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-tiktok-followers-just-username_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000306a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306A 22804 bytes
SHA-256: 8a04fb84d2f05eff45f5233ef6d4bc4647041c96673c37946bdcfa54cf64e6a2
font_01_sfnt_off00006320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6320 19296 bytes
SHA-256: 5f304289c35a5caca60ae5d5074bee34cff1925eeabd9956883fa8e616b1a204

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