Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c0d581ee733a25…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 22:24:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 826833856dc316276d540706cfd0bf23 SHA-1: 868f2ff1dc65fb3d6bd294cd04bad2679593d400 SHA-256: 46c0d581ee733a25a2d4b9eb18acb97513b71a1dd3c3336183f7c806eb10bdc6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for linking to a game hack redirector, specifically http://netcdn.tw/app/431946152/is-roblox-bloxburg-free-game-hack. The document body also contains this URL, reinforcing the lure. This indicates the document's primary purpose is to trick users into visiting a site that likely distributes malware or engages in phishing. No scripts were extracted, but the embedded URL is a critical indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/is-roblox-bloxburg-free-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/pokemon-go-free-qr-code_GM1094591345.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/funny-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-free-expoit-that-run-loadstring_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/new-roblox-items-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/chocolateexe-hack-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/can-u-make-t-shirts-for-free-roblox-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/fast-run-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/is-there-a-way-to-get-free-pokeballs-in-pokemon-go_GM1094591345.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_002_off00003093.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3093 21588 bytes
SHA-256: 78b8fc12e590c011d3ff7fa14be0425dfc08f942377b466d7c8fb243c338d174
font_01_sfnt_off00005fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDC 18604 bytes
SHA-256: cbea71c82a704d00ae0629b27f20a432e2587ca06373a67eac87a98303fc7cb2

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