Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd5214097654084…

MALICIOUS

PDF

45.5 KB Created: 2021-06-08 14:11:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 205101bbabd989eb66fbd024a878b457 SHA-1: 0c74ac4834114036a49b80c1776cd9fd615577fc SHA-256: bdd52140976540849d7cb5fd9170196a6eb04c7d5a144cb0f472feb1d0a385fd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a "free generator / game hack" redirector. The primary malicious URL identified is https://netcdn.tw/app/431946152/how-to-give-yourself-free-robux-game-hack. While no scripts were extracted, the document's structure and embedded URLs suggest a social engineering lure designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-give-yourself-free-robux-game-hack PDF link annotation
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-hack-fairy-tail-forgotten-legend-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-with-no-verification_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_004_off0000535a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x535A 25360 bytes
SHA-256: 934af70667069ce775d9686c5cade867fea5da9c49cc816df60064728dbcd0ba
font_01_sfnt_off00008e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E32 18648 bytes
SHA-256: 9355c79ba1f40d9ba30b0252e825c12780e9b27fb73248b8d1f9f3c07a0418b6

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