Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f94ae9b5fb8a5cc…

MALICIOUS

PDF

41.4 KB Created: 2021-05-15 07:44:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4ec9f665acbe8f10c86e915ed092205a SHA-1: 290bb9091175cb6fb0361202049b459219a5d83a SHA-256: 3f94ae9b5fb8a5ccca49ac4bedfaca787350ffa53269683716df55c4734dc121
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 0.9971

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-and-coin-link-today-game-hack PDF link annotation
    • http://tah-li.com/images/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-link_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/https-rbx-place-rewards_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_003_off000048f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F2 24132 bytes
SHA-256: a317c7927b60cd8beab5c9814014e6d6f186e416a4ce43a2540fe0df903c5deb
font_01_sfnt_off00007eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEF 18412 bytes
SHA-256: 5606d742d49c2f618a839db89fb2f395f675f912dcc06d31cfc3972fb9700339

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