Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ed13d0edaa5d82…

MALICIOUS

PDF

44.6 KB Created: 2021-06-11 03:07:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7a6f0a2062408266ce65435a6fa5e07a SHA-1: 650612d43a3544bc80df898ae03a5500c56c0e59 SHA-256: 53ed13d0edaa5d82cc8016f8131708cac032ee1879d0799123152d7912d757f2
82 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it's a lure for game hacks and generators, specifically linking to a URL associated with 'cheat-ultimate-simulator-roblox-game-hack'. The document body, though partially corrupted, contains references to game cheats and the same URL. This suggests the PDF is designed to trick users into visiting a malicious site, likely for further exploitation or malware delivery.

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/cheat-ultimate-simulator-roblox-game-hack PDF link annotation
    • https://www.tiancom.com.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/static-moonactive-net_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/pokemon-go-free-10km-egg_GM1094591345.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-download_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/pokemon-go-free-walk_GM1094591345.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-many-levels-are-in-coin-master_GM406889139.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_off00005232.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5232 24548 bytes
SHA-256: 9a424c27575c7b12b5063c552adce221d349f5935e1f006e24409379cb4a3c98
font_01_sfnt_off000089a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A0 18988 bytes
SHA-256: a874e851cb770a449d4cf4e9572dbf9f688780b9c51a52300933752819b309fc

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