Malicious PDF — malware analysis report

Static analysis result for SHA-256 3208fc38f79ebfb2…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 07:39:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7b233ac65b02c1f599fd1ea9064743f7 SHA-1: cfcc8824d60d630bf982c2ac2e7771018d1d7bf2 SHA-256: 3208fc38f79ebfb29a127367201b821fe1e11271850b6be0c79564d2f7552459
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 0.9865

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.online/app/406889139/free-gifts-coin-master-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pokemon-go-free-mew_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/tiktok-free-liker_GM835599320.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/links-to-get-free-spins-on-coin-master_GM406889139.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_004_off00004f9f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F9F 25056 bytes
SHA-256: eba90ede3ed808238cc30ebc19670de1bbb16affd7fe21685439a5ae387eafaa
font_01_sfnt_off000088fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FB 17712 bytes
SHA-256: 982f424818d2cc6c65a12e1040d006be3e19cba50bc69db2ca0f75fa75a43871

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