Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af690f4639e38a7…

MALICIOUS

PDF

46.2 KB Created: 2021-05-19 03:32:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ec6949ab1ab218dcfeed53706f73a82d SHA-1: bf49049f4e3df504ea1e9f78e39fac7c90d100ea SHA-256: 9af690f4639e38a724a31e408e351f3b233ad5fd2c8b097b7802b6c8d8fdca20
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and sites offering game hacks and free currency, indicating a lure for users to download potentially malicious files. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9278

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/431946152/aimbot-exe-roblox-game-hack In PDF document text
    • https://shjbottle.com/upload/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • https://shjbottle.com/upload/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/2021-roblox_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://shjbottle.com/upload/files/spin-coin_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • https://shjbottle.com/upload/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/is-coin-master-free_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://shjbottle.com/upload/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://shjbottle.com/upload/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004764.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4764 26380 bytes
SHA-256: 089b1067e110b49c2c4812b2d8441079dc8b6a25415a9b259ff50bb4568b1710
font_01_sfnt_off00008599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8599 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9240 18268 bytes
SHA-256: a9a3edf919d8e4b80656073fb67e5742f53e98381c25ee0e4c723ed5632f254a

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