Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecdc87bc7e653439…

MALICIOUS

PDF

45.5 KB Created: 2021-05-19 23:40:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 31adcf9503f2c2f5fad654a316e7ec2f SHA-1: 12650d2694bbe6324d7eb12639e5fa090b48007c SHA-256: ecdc87bc7e653439b031d9bccaa0478c5ff823093d80a5c325e9e16dcbe271f1
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 0.9507

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/431946152/code-free-robux-game-hack PDF link annotation
    • http://spentulib.com/search/repository/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search//repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search//repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/easy-robux-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_off00004921.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4921 26404 bytes
SHA-256: b4482df805c34413d225f24353266cf3414f68721459860f52cdeb884173a91b
font_01_sfnt_off000085df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85DF 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA1 18188 bytes
SHA-256: 00280273b0975bee0187bf1a1cc0e29ac13cf800f2976c84d5f4ba53341fee41

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