Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd5e6ef5693bf96…

MALICIOUS

PDF

45.1 KB Created: 2021-06-11 00:38:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9e4c05d52e600b16d8d4a5b822914c7c SHA-1: 704f120a9a4281060eccd398ed299e05b2b49247 SHA-256: 1fd5e6ef5693bf9642ba2244e7a0de7a97f8416068945831b50a17c131e106f4
82 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs that redirect to websites offering game hacks and generators, a common lure for malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the document's structure and embedded links strongly suggest it's designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-roblox-gun-gsmes-game-hack PDF link annotation
    • http://sbm-nn.ru/images/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-freak-bloxers-hacks_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-roblox-dragon-ball-rage-android_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-roblox-promo-codes-2021-august_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-roblox-accounts-with-robux-and-obc-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/ways-to-get-free-robux-2021_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_off00004fdc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FDC 26352 bytes
SHA-256: 6e0edb5a96d797550453337ba234e822b7d5cec66b5e6b8fb1b8b7c6f85d80cf
font_01_sfnt_off00008dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD5 18348 bytes
SHA-256: 5077a2638dd1ecaf9231478813de1ce166feb4881b3aea5eb1f90a333baa1af8

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