Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3656e8dd708607…

MALICIOUS

PDF

48.2 KB Created: 2021-06-03 09:57:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1d25e2dc5201a7e016a691b1f3984bdc SHA-1: 365c8ca2eb1b5029347360d74b8b04e6d053411b SHA-256: dc3656e8dd708607aae05b5d3dfb549198a918e30322909fdc3f46470026d5a6
102 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks and free in-game currency, directing users to a malicious URL. The embedded link, https://netcdn.online/app/406889139/how-can-i-get-free-spins-on-coin-master-game-hack, is associated with a high-severity heuristic for game hack redirects. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or social engineering attempt to lead the user to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/how-can-i-get-free-spins-on-coin-master-game-hack PDF link annotation
    • http://digilib-unirow.ac.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-roblox-cards-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/body-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-roblox-executor-no-key_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005001.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5001 30084 bytes
SHA-256: 8afd1458bae76eafada357d80e0a56061460ee3d0cc502d596542462a34addd4
font_01_sfnt_off00008fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC2 18052 bytes
SHA-256: f4ab70c7a1b321e89283bf56011259b2481f340c7b70b557de06403c5562b8cd
font_02_sfnt_off0000b0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FF 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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