Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f607da3ccbf595…

MALICIOUS

PDF

44.4 KB Created: 2021-05-14 00:28:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a0b9b8e44b64f638ddf062d68b9396c4 SHA-1: 46b5082eb09d1bda69c3a0f9373d608de347190d SHA-256: 41f607da3ccbf59575894e06353fb78239db5172ae35092ce3aa51cfd2abb3a1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9632

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 https://netcdn.xyz/app/406889139/coin-master-free-spin-reward-links-game-hack PDF link annotation
    • http://www.mosaikshop.at/images/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://www.mosaikshop.at/images/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-blogspot_GM406889139.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_off00004890.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4890 24508 bytes
SHA-256: 6cd95624ab3d2d609b5d26baffbb862d81dcf97bc984ad80ad1f6299d60b03e8
font_01_sfnt_off000080a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A8 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8E 18396 bytes
SHA-256: b3a11fba1cb2f700afeb24321b2748de206350cd68cebaac90114e68d657d658

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