Malicious PDF — malware analysis report

Static analysis result for SHA-256 a366c273b9b0d5bc…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 17:51:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0c5bf90fe5496e0cd603c1d7ba61b702 SHA-1: 69e0d8f1c3e36604cfc53f5e416e8d5018de89a6 SHA-256: a366c273b9b0d5bca8237e23b6436e14eb2c63bed0cdd4345fc2ff3d27bcfdd2
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/how-to-hack-coin-master-spin-in-hindi-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/how-to-get-dominus-empyreus-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-r-obux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-gift-card-codes-2021-not-used-england_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/2021-hacks-for-da-hood-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hacked-pour-avoir-des-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/aimbot-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/muscle-roblox-manequin-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-wall-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-prison-life-hack-script-mobile_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-codes-gift-card_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-catalog-hack-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-a-roblox-hat-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/where-to-get-a-lot-of-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-pe-free-download-ios_GM479516143.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_off0000318c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318C 22688 bytes
SHA-256: 0a9ac86298131bb2b6bc8ba6519880ab2b4db72041c386328e9376282dc1dc99
font_01_sfnt_off00006410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6410 18520 bytes
SHA-256: a858dd88c372e08a0f3d9237032407f953de1c9476e9d76775859c952356f15c

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