Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de6bceee75a66da…

MALICIOUS

PDF

41.5 KB Created: 2021-05-17 12:49:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9bbea2f000f97e7c5248e287fcdf23f2 SHA-1: e70922b4a42adef0a3b63e961f70940bd3bfb98e SHA-256: 8de6bceee75a66da12f3a547dc29afae5fff25af5f58cbb2af0447aee6ae2e6c
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a visual download button, strongly suggesting a lure to download a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence. The presence of links related to game hacks and cheats indicates a social engineering tactic to entice users into clicking and downloading.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.xyz/app/406889139/coin-master-stop-attack-hack-game-hack In PDF document text
    • https://sitam.co.in/images/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • https://sitam.co.in/images/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://sitam.co.in/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • https://sitam.co.in/images/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/robux-app_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://sitam.co.in/images/how-to-robux_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://sitam.co.in/images/free-robux-promo-codes_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_003_off0000492c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492C 24376 bytes
SHA-256: 459835afa4beef693b9a19af9b20f889c32d3ed53e2f9b90dfda58d151fb1088
font_01_sfnt_off000080df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DF 17892 bytes
SHA-256: 39a576627da682e915740756597514a1a33942882bdfaf8ae0370b937314ba67

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