Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e33f3a94c9dd5e…

MALICIOUS

PDF

42.3 KB Created: 2021-05-13 14:01:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e8287a46082fc44e495e8b50071d1533 SHA-1: 1dcecb995098a52792777a535e28f51aea2abacf SHA-256: 19e33f3a94c9dd5e6c4edb711e9f816c197360daab2f9f42cc3eba83f42e70e1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and "generators". The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links reinforces this. The document body, though heavily obfuscated, contains references to these lures and the primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/minecraft-diamond-finder-hack-game-hack In PDF document text
    • http://seniornetwanganui.org.nz/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/robux-app_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coinmaster-links_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_003_off000049d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D8 25112 bytes
SHA-256: e88cf843d4fb05313521ba75c7492957fb244df8288fe5aa4b219e894046c67f
font_01_sfnt_off000082a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A7 18484 bytes
SHA-256: 265962787b73e694aac7c67ed987488fc8d8021a4c66c1127c37ccae154b779c

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