Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc8bd4311a2a0a0…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 09:16:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 68a3956fb7f1dae8c626fcb3790b0033 SHA-1: adaca58f28dbde30b39dd6107316e605d464b2bc SHA-256: cbc8bd4311a2a0a00d824b6deeaa6b4cc6e68e0c7c53dc01a51da6c4291d983d
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 0.9748

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.online/app/406889139/are-there-any-coin-master-hacks-that-actually-work-game-hack PDF link annotation
    • https://3qblocks.com.tw/image/data/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/best-hacked-client_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/2021-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/mc-update_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A2 24232 bytes
SHA-256: 44706b9f34c56ac15d182ab067775af18de0ae249fc2da1ef7ba70aa9658a480
font_01_sfnt_off00008837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8837 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off000091da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DA 18472 bytes
SHA-256: cbcebafbcf3f0ede5aa3be7eddcb12699961b73018073e13810fb2a936e6d0ab

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