Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dfd0c61307ce937…

MALICIOUS

PDF

32.7 KB Created: 2021-07-04 05:33:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3a4019d6f7698cb91efffc9980f72c53 SHA-1: 5bf1f3f98ae96229b30193877ee37c53e8af91ab SHA-256: 8dfd0c61307ce9378a4d131298cc2a77afbe641708ebdff963bf0dd07dcb3f24
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game items or accounts, directing users to the URL http://netcdn.tw/app/479516143/free-minecraft-java-edition-account-game-hack. This URL is associated with a high-risk heuristic indicating a game hack redirector. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URLs and the lure suggest a phishing or scam attempt.

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/479516143/free-minecraft-java-edition-account-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/pokemon-go-free-map_GM1094591345.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/counter-blox-roblox-offensive-skins-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-free-no-virus_GM479516143.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/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-mazda-2021-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-swat-shirt-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-girl-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-vehicle-simulator-roblox-upate-10-12-17_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-weight-lifting-simulator-3-script-hack_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
font_00_sfnt_off00002ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEB 21640 bytes
SHA-256: 9595f1082de7a46964cea8516517208e337a516e71160004c78c37c84d8ea4e8
font_01_sfnt_off00005c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3A 18592 bytes
SHA-256: 862cdae332e3e1505b8d23dd1d1cbdc9138135ea06a45298c11b12c54c771a57

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