Malicious PDF — malware analysis report

Static analysis result for SHA-256 3971a72408726ecd…

MALICIOUS

PDF

33.9 KB Created: 2021-06-27 12:28:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2f1fa872f8b37229fb9106f67cc65320 SHA-1: d31be8f93fe5d0c3e92d9ad5b35e8f3197a15e5f SHA-256: 3971a72408726ecdf6e87534e7f6112e42e79fde8e396c9dae2e651dca877f53
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.co/app/431946152/free-exploit-roblox-game-hack PDF link annotation
    • http://stikespantirapih.ac.id/home/repository/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-whatever-floats-your-boat-level-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/cheat-roblox-2021-argent_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-codes-2021-august_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-ban_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hacked-tshirt-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-good-groups-to-claim-in-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-on-roblox-2021-july_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_off00002e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E73 22028 bytes
SHA-256: ba79b0868f32f4bce3883e6002a243a96ebb03da5cab3803e853056d73aa42a2
font_01_sfnt_off00005f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 19048 bytes
SHA-256: 0e9ebbd587c5ea04b3856f33e7c1a424eb2af9945ce13ce0148b7da1440d0dbd

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