Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1a88f4a5107c69…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 17:27:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7c33fdf39199e134b303310831ef84dd SHA-1: 53e3f83056ab459717b8d8e5eab06a994307686a SHA-256: 0b1a88f4a5107c69a0d8a9a3750a538fd4d642fc146aa277e6583e17ebbf7452
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/479516143/minecraft-servers-that-allow-hacks-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-counterblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-a-noclip-roblox-hack-working_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/get-free-robux-in-1-minute_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/link-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-roblox-simulador-de-levantamiento-de-pesas-3_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/is-tiktok-free-on-app-store_GM835599320.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robux-gainer_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-para-roblox-hospital-roleplay_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_off00002ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFD 21672 bytes
SHA-256: 900bff405a9722f9bf39ba842064f0f22aa257986d10dcf313f031276dad1427
font_01_sfnt_off00005fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 18688 bytes
SHA-256: 52b008c1dee13834d2ec83d98dfe79a40f83e68d5b96d4fb2c84ac72eafae7a4

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