Malicious PDF — malware analysis report

Static analysis result for SHA-256 931c006b8f69d25c…

MALICIOUS

PDF

35.0 KB Created: 2021-07-07 12:14:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5fd8f4f09288a74d933f334f93f4bcdd SHA-1: 98c161fb633d43db6bfd57d5b387d8d4e21d7a59 SHA-256: 931c006b8f69d25c1d60c1f4d77adf0f1469044dcf0bd0aef498c19eae5db85e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack lure. The document body and extracted URLs promote 'Coin Master' and 'Roblox' hacks and free currency, directing users to click on links. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-links-that-don-t-expire-game-hack, which likely serves as a redirector to a malicious site or a payload download. No scripts were extracted from this sample.

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/406889139/coin-master-links-that-don-t-expire-game-hack PDF link annotation
    • https://www.orbai.ai/uploaded_files/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/roblox-cheat-engine-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/roblox-strucid-hack-mac_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/freerobuxdd_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-steam-codes-no-survey-robux_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/cheats-for-mega-gun-obby-roblox_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/roblox-oprewards-hack_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/roblox-twisted-murderer-hack_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/promo-codes-roblox-robux-free_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/roblox-free-clothes-template_GM431946152.pdfIn PDF document text
    • https://www.orbai.ai/uploaded_files/userfiles/files/no-scam-free-robux_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
stream_002_off000030e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30E3 22976 bytes
SHA-256: ac3dbc40c174469f454450fe580f101b3184ff3ac0fe7055be5e68040a79f3f5
font_01_sfnt_off000064aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AA 18724 bytes
SHA-256: 0bc74d52f75a1104db5e4695d05e5addd24de774456fb5db8c3829ae8d2508b3