Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0713544073354ab…

MALICIOUS

PDF

35.2 KB Created: 2021-06-20 10:44:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 78164cee076eae44b2e9cdea6cba9e05 SHA-1: 6c735edba9749d75e7d2ad89606042e48126344b SHA-256: b0713544073354ab76a8a209a8189b6a1783c780c8e1162e5ec2611d1cee9f43
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free in-game currency, directing users to the malicious URL http://netcdn.co/app/431946152/dog-roblox-free-costume-make-game-hack. This URL is likely used to download a second-stage payload or redirect to a phishing page. The ML classifier also strongly indicated maliciousness.

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.co/app/431946152/dog-roblox-free-costume-make-game-hack PDF link annotation
    • https://www.tw-storage.com.tw/upload/files/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/robux-survey_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/free-le-robux-site_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/roblox-account-taker_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.tw-storage.com.tw/upload/files/free-magical-chest-coin-master_GM406889139.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_off000030d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D9 22432 bytes
SHA-256: d84400219b98a45811fd45ea58d3a46399efb4cfd304dc3d11dd38b03e118124
font_01_sfnt_off000062cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CC 19688 bytes
SHA-256: 8d84fb1e2e2907cdaf6cb387886da1284e384102b4f170443c8aeee621a5497d