Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28a3b884a0f04fb…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 20:54:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 29eaec3200aaafe6fb8510d95583752b SHA-1: ea5fc48cc75e917673ee2e42b0cf5e829799a1ce SHA-256: b28a3b884a0f04fbd28686124cbc1f1624df95baecc10db9d5fd50fe30754dff
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.tw/app/406889139/coin-master-hack-pc-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/roblox-free-draw-2-alpha_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-instantly-get-free-robux-in-roblox-2021-oprewards_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-use-cheat-engine-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-speed-hack-2021-august_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/como-hackear-dragon-ball-rage-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-cia-robux-gratis_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-roblox-btools_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-meme_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-apocalypse-rising-2-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-coins-coin-master_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_off00003207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3207 23192 bytes
SHA-256: e681d41700c82c6200b1978fd29cc6ea75f702a08501f6d1201f725b06c03c4c
font_01_sfnt_off0000665c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665C 18160 bytes
SHA-256: fd8dd7e41966129b00bd6faab6d015b3d95d63fef28ab848195abaaf238f8237

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