Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1e6bae4ab6c618…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 22:17:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7c781e5701332de49523d3cdb1b90ac2 SHA-1: 5217fea90e4581ce595e1ea302aa0ce79774af34 SHA-256: 5f1e6bae4ab6c6182351e053549279fae81513878039c8b7a8042fd2ccba3d8c
82 Risk Score

Malware Insights

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

The PDF file contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, which is a common lure for malicious sites. The document body and embedded URLs reinforce this by mentioning 'robux', 'game hack', and 'free generator'. The primary IOC is the malicious URL identified by the heuristics.

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/431946152/grabpoints-robux-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-no-spam_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-teapot-turret-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/any-working-robux-hacks_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-games-where-you-can-get-free-stuff_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/tiktok-free-like-generator_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-reward-link_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_002_off00002e3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E3A 22936 bytes
SHA-256: 0b848fc4ce57a8271698d9c457b075df6307f0a9a867eaf165a17db50f317ab4
font_01_sfnt_off00006160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6160 18952 bytes
SHA-256: 3646c9e8f9274f81ffafdae012ef6d50837bbfb2ee4a4e5094e57fa7d940b82a

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