Malicious PDF — malware analysis report

Static analysis result for SHA-256 441835d60b7fe597…

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 05:10:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b9704444789d44862a591c3fa115fece SHA-1: 4e309135b731d418a5fc41f0e052ba20e2614fd8 SHA-256: 441835d60b7fe597b0f2608e58575c54b785a23588f2b3eda728bc2e04d49da3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. 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 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-daily-spin-free-game-hack PDF link annotation
    • https://tanahlot.id/assets/CKImages/files/https-web-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-free-printables_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-rocitizen-money-hack-glitch-daily-bonus-patched_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-free-dominus-roblox_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-check-cashed-v5-lumber-tycoon-2-money-hack_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-hack-roblox-jailbreak-mobile_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-person_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/cheat-engine-roblox-tycoon-2021_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-roblox-card-reedemm-code_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/pig-master-coin-master-free-spin_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
stream_002_off00002ff5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FF5 22988 bytes
SHA-256: 1756ef411ecc5aa775ee6e60cd37adf73e574c8780cbb862196d9861ea9cc63b
font_01_sfnt_off0000639a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639A 18596 bytes
SHA-256: 4bd887bddad3707660fa4e91161c1a16423faf42318738ff8904c415139aa447

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