Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9eef67b85c98217…

MALICIOUS

PDF

34.4 KB Created: 2021-06-27 17:35:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 130a2ae5c4d6b0a13991a4b03f4ad7c9 SHA-1: a15aad20fbe71782d8b750ac679951208cb2ff47 SHA-256: a9eef67b85c9821768c7aef341d432f9371440bc8932ecddb09299036335b469
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a common lure of 'game hacks' and 'free currency' to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/injector-hack-robux-game-hack, is associated with a redirector and likely leads to a malicious payload. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to exploit user interest in games for malicious purposes, likely leading to the download of further malware.

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/injector-hack-robux-game-hack PDF link annotation
    • http://library.unissula.ac.id/fk//repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/robux-star-code-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-hack-roblox-weight-lifting-simulator-3_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-codes-get-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/open-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/pubg-uc-20210_GM1330123889.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-hacking-with-mr-bean_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/creat-things-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/www-free-robux-tips_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-how-to-get-free-robux-no-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-no-phone-number_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hack-roblox-dragon-ball-rage-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/unpatchable-robux-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-3-steps_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F97 22464 bytes
SHA-256: b689ffcab5097e86096b22fc06649642dfb1253c59c35867b51d5c1d628862a0
font_01_sfnt_off0000614b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 19016 bytes
SHA-256: 8c8c623dd35b518cc108571548df5607c8c7747b5145d3160cb7c2cebbdeb80b

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