Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab862c682f115ed7…

MALICIOUS

PDF

47.6 KB Created: 2021-06-11 09:06:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 44ba45f24bd2191b6f9dea90051c7843 SHA-1: 89ba251546058b7427e6f5eadcad54800f112483 SHA-256: ab862c682f115ed7ba5508ce7b00e359e7f7e6136c02882bddb46c08e9872e0f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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-robux-sites-youtube-game-hack PDF link annotation
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/hack-roblox-pc-sur-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/roblox-free-robux-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/hack-robux_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/coin-master-com_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • https://www.nonglong.go.th/ddd/UserFiles/File/minecraft-mod-menu_GM479516143.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_004_off0000535e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x535E 24980 bytes
SHA-256: e8564902b29607e094700599beb1aba9f96c8000ea1d173d9b605785f40dc5e7
font_01_sfnt_off00008d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D49 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000096fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FA 18400 bytes
SHA-256: 939b521a3e5198f665be262a0c67cedef85b6a583f36b8cff66f83f8b0d5b12e

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