Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d60c5122c89ad5…

MALICIOUS

PDF

49.3 KB Created: 2021-06-04 03:13:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2c73fce5ea522e423db765dac8a975a3 SHA-1: d082221fb7523099e595f91d5a290b0308df4acb SHA-256: b9d60c5122c89ad503efaf18698eec805f7f21f327aa61fa7e5f2c9cc599ea42
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 0.9871

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.online/app/431946152/free-vip-server-roblox-jailbreak-2021-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-no-survey-2021-no-verification_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
stream_004_off00005205.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5205 33364 bytes
SHA-256: 28d6900bb90b3d6b1b722d437935ea187be8c45c3230a66ba581af00c84924b2
font_01_sfnt_off00009adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADB 19456 bytes
SHA-256: d90345a9dcaa6dffee37cb2139bcdb4fd638cdaa26d6bee974f34c5cd738664d

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