Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3da57b92430bd8a…

MALICIOUS

PDF

44.6 KB Created: 2021-06-09 04:35:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1e706c0cdf8cfa49683573b3fb4567da SHA-1: c3ef82cb1155c0037d8927df0b59d0d334063a97 SHA-256: a3da57b92430bd8ab998ff9789ed45dbcd6e12fdb36bffb5de061527f76540b1
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 0.9865

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.tw/app/431946152/how-to-sell-items-for-free-on-roblox-game-hack PDF link annotation
    • http://www.pustaka.pn-calang.go.id/repository/how-to-make-robux-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/is-tiktok-free-to-use_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-group-clothes-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-builders-club-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-microsoft_GM431946152.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_off00005084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5084 25524 bytes
SHA-256: aa6db8a00396e6365038fcf2ab9c99107cacf8c80786f3495c9dcbda78c4c231
font_01_sfnt_off00008af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF5 18476 bytes
SHA-256: bb3808eeb12858c060c19d8b68b32f2ec189893b3d681e74e246ee038483a123

Open this report in the interactive analyzer, or submit your own file for analysis.