Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f3ea876bae6115…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 03:27:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c3d9dac5ab53382e338f010f884df08d SHA-1: 865e70184b2a31aac1ddbcd4d2c694921954fb19 SHA-256: 96f3ea876bae611537528ebccf6024f90c7e1a49f5b63f5bf7c00a2021b68973
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks'. The primary link, http://netcdn.tw/app/406889139/2021-free-coin-master-spins-game-hack, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure the user into downloading a second-stage payload or visiting a malicious website. The document's content and heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/2021-free-coin-master-spins-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/robux-free-2021-september_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-clothes-roblox-youtube_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-in-any-game-on-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-roblox-on-ios-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-booga-booga-auto-farm-hack-afk-farm-working-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/comant-avoir-le-shop-de-roblox-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-bank-tycoon-free-vip_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-dominus-roblox-not-a-model_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/mcpe_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-fly-hacks-download_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_002_off00003383.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3383 23240 bytes
SHA-256: 0d9e065d96b2176b31f0c79c22d6e15631439c8f14dfecafc8ae9b83337f2561
font_01_sfnt_off00006807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6807 18576 bytes
SHA-256: 1dcfde0ea894eaede7563a613ed9f74afd7599b0d21c5c843a16c586c159ef3a

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