Malicious PDF — malware analysis report

Static analysis result for SHA-256 1176c97f59db6f9c…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 19:19:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b34ecebe0f4868ac08d659138307ec98 SHA-1: 741b1424532b7d9b36305969527aaea027f585d5 SHA-256: 1176c97f59db6f9c17785451155cab81d2bb3f1a429f8d9d7e6076cdc2713664
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/406889139/get-free-spins-coin-master-link-game-hack PDF link annotation
    • http://elibrary.smknesbu.sch.id/repository/robux-hacks-tay-take-off_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/is-there-a-legal-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-mad-city-free-car-glitch_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-download-android-free_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-rocket-fuel-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-get-game-resources_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-how-to-get-free-robux-no-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/5-000-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/crop-tops-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/april-fools-day-2021-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-trainer-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/would-you-get-banned-from-roblox-if-you-hacked_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-free-100k-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-make-a-cheat-on-roblox-roblox-studio-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-make-a-roblox-scam-website-free_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-rewards_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_002_off00003195.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3195 22772 bytes
SHA-256: 2447e3e48a243c6cc16e6ca9e28849da3ca02e26bab2c6fa25015b1f64f856b2
font_01_sfnt_off00006451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6451 18344 bytes
SHA-256: 008ba69f0314e9023a50c7a3f8f30ae70ce6a190ac3370128d1712d4e8427767

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