Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa3addb69296afc…

MALICIOUS

PDF

45.9 KB Created: 2021-05-13 20:34:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9e3b005e4432b7de7f3d22698be79a61 SHA-1: 387123354f283dc54d1ae4708f45afecb1c66d49 SHA-256: 5fa3addb69296afca80e3c24c21c449a28797fe686e6188d9b43162d2c64ecfa
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive 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 0.9432

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.xyz/app/479516143/minecraft-windows-10-hacks-game-hack PDF link annotation
    • http://atrax.hr/files/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-roblox-printables_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/coinmaster-com_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b41.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B41 25344 bytes
SHA-256: cebb677805ca44b4844d3c1d2f37bcf024904b47f39c28e9b54c67ea25d41c8d
font_01_sfnt_off000084b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B7 3092 bytes
SHA-256: 3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
font_02_sfnt_off00008f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F62 18696 bytes
SHA-256: 14f86b407040f424958936cb2b2b49b26067a8980bd50a77917f0563cc1bff87

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