Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b4c7166c3a92988…

MALICIOUS

PDF

43.1 KB Created: 2021-06-14 00:32:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 396c696dc8a8498ec26092ea9c2b867e SHA-1: 12dc9521ecccae76f4cdf5dfa18b1df5a7262301 SHA-256: 9b4c7166c3a92988016e06569474d773cb6527c075b79a8d7666c30cb2a92637
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9969

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-catalog-item-hack-game-hack PDF link annotation
    • http://library.fk.upnvj.ac.id/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-stop-getting-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/protosmasher-roblox-hack-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-do-you-hack-roblox-kick-off_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-do-you-get-free-robux-without-human-varifacation_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-make-a-free-robux-scam-game_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-how-to-save-movies-for-free-roblox-action_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-tik-tok-2021_GM835599320.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-duplicate-coin-master-spin-hack_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_003_off000047b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B7 26792 bytes
SHA-256: f0ba99c83fc2e6130b886f60798aff83a35c1a2744bc34cffd919fe39ac249f1
font_01_sfnt_off00008489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8489 18832 bytes
SHA-256: cedbaf75b31d7a66128c36c618018783fc6cda427f6ec153d0a8afd40b6d1f69

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