Malicious PDF — malware analysis report

Static analysis result for SHA-256 44510b01bc75dd06…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 23:32:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b45ebdf23b750a9784b0f7bc3e2694cb SHA-1: 5dfc391d40ed703cd8387b8b12f1efac0540fa54 SHA-256: 44510b01bc75dd067cba24f1f6b36bce077634b9ffd6cbe11a03281fa6d362f1
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 0.9797

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 https://netcdn.online/app/431946152/robux-xyz-game-hack PDF link annotation
    • http://library.umla.ac.id//repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/pokemon-go-free-602_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id//repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E20 24224 bytes
SHA-256: 92b550c35467e55fd800c524ad5cf2ed04e7407e16889173d13f948f8d62fc33
font_01_sfnt_off00008548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8548 2832 bytes
SHA-256: 78e89c8f621d90011ffb7a2107d701d4cdf090a2f2cf42d5a65297289afc8805
font_02_sfnt_off00008ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF8 18112 bytes
SHA-256: ca7f5f9618641a98a9c19d491d3cdfb459cfe3a3cc083d97c385a6405de8606e

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