Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f54f3d88211691…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 13:07:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 054ca4b2e3bc800ffa7e8852a71be362 SHA-1: b24854626aee3bc5347279e7ad60d18d87b4d284 SHA-256: d0f54f3d88211691e8e0cb8e534625f62c5585a2f8936a6afcfabec127a37ee1
182 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, many of which are SEO-optimized PDFs promising game hacks and free currency for games like Coin Master and Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_SEO_LINK_FARM' indicate a malicious intent to redirect users to potentially harmful or scam websites. The presence of 'cmd-hacks' in the document body further suggests an attempt to exploit user interest in game hacking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.tw/app/406889139/daily-free-spins-coin-master-2021-game-hack PDF link annotation
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-unlimited-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-code-for-2021444-robux_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/roblox-free-download-pc-windows7_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/hacks-for-roblox-how-to-fix-them_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/pastebin-free-robux-100-working-2021_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/chreck-cashed-v3-roblox-hacking_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/roblox-cmd-hacks_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn macro / runtime command snippet
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/noclip-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/how-to-hack-and-on-roblox-on-muderer-mistery-2_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/how-to-get-free-robux-and-tix-without-hacking_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/how-to-hack-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuIn macro / runtime command snippet
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000316a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x316A 22980 bytes
SHA-256: 04ab5f7963b426fe40524d8fc9962f5c5ac863568fb65e5182075933c940780c
font_01_sfnt_off000064ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64ED 19000 bytes
SHA-256: 933a9abb3ea4f8fbe1c77bcd3d2591622a827aeefe2bea77f70e7028cf79008c

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