Malicious PDF — malware analysis report

Static analysis result for SHA-256 05796b9fe98843b3…

MALICIOUS

PDF

44.0 KB Created: 2021-06-09 03:55:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8bc231c8956bb4e69ec9f37a1643168d SHA-1: 1554389c03754dd123a875aaeb01dc11d8d7a68e SHA-256: 05796b9fe98843b346d922c543f170c6cffb875110f78bb9b79e4a27993a2b29
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/test-roblox-clothes-free-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-call-of-robloxia-5-cheats_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/com-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master--hack_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/gamehunters-club-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
stream_004_off00005167.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5167 24460 bytes
SHA-256: 9372d88e9987356d6faa3b331f6c9cd82a51af14386e27d86a4752da348679c4
font_01_sfnt_off0000898c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898C 18216 bytes
SHA-256: 8fcb814a927bed27c00ce2120dfbc41d7de833e1f712f300ebf3342dc12de89c

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