Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec50d57dcf5f5f8…

MALICIOUS

PDF

57.4 KB Created: 2021-06-04 03:02:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a7f8591aef6597121cc2a69084836c51 SHA-1: 4a67963336ad024c38f113359fcf66770309512b SHA-256: 3ec50d57dcf5f5f8033b5d1f1fe2dadd9ecab2791dbf6eada0ce09ad231610a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and 'free robux'. The primary malicious URL identified is https://netcdn.online/app/406889139/free-coin-master-hack-no-verification-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9684

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 https://netcdn.online/app/406889139/free-coin-master-hack-no-verification-game-hack In PDF document text
    • http://lib.mbp.ac.id/repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/tiktok-views-free_GM835599320.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005515.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5515 25908 bytes
SHA-256: 9b0e4394f9f7446390bd9e6bee85c85ce965a4f153f5f9c84be6bc07b648e2f5
font_01_sfnt_off00009185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9185 3236 bytes
SHA-256: a34509eceaff37adbbd9c524db6b27eb2481f144c7ef351acc8ae174867cd029
font_02_sfnt_off00009cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDE 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000b003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB003 18016 bytes
SHA-256: 22df04c4dacbc852f4ecaf83adb1826ed6293343c5161e377e09b669fc2092ee
font_04_sfnt_off0000d127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD127 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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