Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a9c5231f6f6d87…

MALICIOUS

PDF

33.3 KB Created: 2021-06-19 18:39:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 71826517cedf5b53d6cffd1f457ac504 SHA-1: 1d27781d46d7b903b95db65ce6ed59979142c768 SHA-256: 67a9c5231f6f6d879f8edec44c273dd144e6ccc43705c3e14cd3c8e165e2cbc1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple heuristics indicating it is a lure for game hacks, specifically mentioning Roblox and One Piece. The primary URL, http://netcdn.co/app/431946152/roblox-hack-dark-devs-one-piece-game-hack, is presented as a download link for such hacks. This pattern is commonly used to trick users into downloading and executing malicious payloads.

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/roblox-hack-dark-devs-one-piece-game-hack PDF link annotation
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-instal-wall-clip-roblox-hack-from-wearedevs_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/robux-codes-unused-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/pokemon-go-free-game-download_GM1094591345.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/hacks-tools-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-hacks-for-ipad_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/pubg-uc-and-bp-generator_GM1330123889.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-heroes-online_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_off00002db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB1 21456 bytes
SHA-256: c06b74e57e71b3618615f942fe77246a949d8c44a716b22c014a25141ff93228
font_01_sfnt_off00005c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7F 19212 bytes
SHA-256: f1c6e1a447163b7c60ce35d8e7ba7f34568e96544f790da91e6193fcc8f2d950

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