Malicious PDF — malware analysis report

Static analysis result for SHA-256 1492682c20e6ab8e…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 03:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 414961849ce53a7568511879f3ae246b SHA-1: d60187002ec5fb2482731ef9cf116411383a477b SHA-256: 1492682c20e6ab8eabbc4193c7aa258254a00727057c207d3eb0f7a3f79c1755
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-2021-game-hack PDF link annotation
    • https://www.sarsen.net/uploads/files/files/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/roblox-necklace-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-hack-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/roblox-game-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/god-mode-hacks-for-roblox-arsenal-of-free_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/app-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-wings-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/only-working-way-to-get-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/roblox-free-dominus-download_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-army-base-roblox_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/apocalypse-rising-roblox-hack_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
font_00_sfnt_off0000307e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307E 22580 bytes
SHA-256: 35064e1f36e2052f00fd58aebfcd7750b51b518f884d156e856fe08c9438b463
font_01_sfnt_off000062b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 18576 bytes
SHA-256: a126babb65047b6746617d7d7f27a00b485a4a24246b96e57b4b97a03add53e0