Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b1faccaccc84359…

MALICIOUS

PDF

50.4 KB Created: 2021-06-08 23:00:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5e32a2ed418a6460b1d042a0ee95d2b4 SHA-1: a47aac04af666ec7dc869d6922caa43d9523733f SHA-256: 3b1faccaccc84359ccc1c93b8e650ccb0dddaf1ef4ae382b8d792e266c0119aa
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document contains multiple embedded URLs and a primary external URI pointing to sites that promise free in-game currency or items, indicative of a phishing or scam lure. The ML classifier strongly flagged this PDF as malicious, and the presence of download/call-to-action lures reinforces the malicious intent. No scripts were extracted, but the document's content and embedded links suggest a social engineering attack to trick users into visiting malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.tw/app/431946152/earn-free-robux-by-completing-offers-and-surveys-game-hack
    • http://stiepariperpus.web.id/sarjana/repository/coinmaster-spins_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/roblox-free-robux-com_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-education-edition-free-download_GM479516143.pdf
    • http://stiepariperpus.web.id/sarjana/repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-free-clothes-on-roblox_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/free-spin-generator-for-coin-master_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-hack-apk-2021_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-spins-2021-hack_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-hacksco_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/minecraft-bedrock-edition-hacks_GM479516143.pdf
    • http://stiepariperpus.web.id/sarjana/repository/free-coin-master-credit_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/chisel-and-bits-mod-minecraft-pe_GM479516143.pdf
    • http://stiepariperpus.web.id/sarjana/repository/25-free-spins-coin-master_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-gameplay_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/microsoft-free-robux_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/2021-free-spins-coin-master_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-hack-app-for-iphone_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-jar-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005389.bin
576ccdc308fdd7e7e6d9531426f6a214e42e790ce1e1c4a4c1cbb35e61dda332		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5389 26888 bytes
font_01_sfnt_off0000910f.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910F 5696 bytes
font_02_sfnt_off00009e21.bin
00939a59d7d9a1e801dc6341d2307c5c5fb5281bf4e3fbafee68e873ada75b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E21 19732 bytes

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