Malicious PDF — malware analysis report

Static analysis result for SHA-256 4336d792f79d0abe…

MALICIOUS

PDF

46.3 KB Created: 2021-05-16 05:02:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 35147c5faaf389e211c134cd1fade7af SHA-1: c6d8e6b9f59657d23f103de9d6add9fdc4e9e239 SHA-256: 4336d792f79d0abe2ca79b65da9853e386df6979da753c205f6cf722a37e9f24
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 spins' and 'game hacks'. The primary redirector URL is https://netcdn.xyz/app/406889139/free-spins-coin-master-october-13-2021-game-hack. The document body and embedded links suggest a social engineering lure to trick users into visiting potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9278

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/406889139/free-spins-coin-master-october-13-2021-game-hack In PDF document text
    • http://islandhopper.com.au/images/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://islandhopper.com.au/images/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://islandhopper.com.au/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://islandhopper.com.au/images/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BE 26848 bytes
SHA-256: 3a12de812e791f598736b1aa08f5c3e0c4d9ad12650b8b0452b609bd9627a1bf
font_01_sfnt_off00008718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8718 2956 bytes
SHA-256: cc6ee08a5af07cdf809d5f718a6f4b581fc47059b13d069ac995502e41039ee4
font_02_sfnt_off0000913b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913B 18620 bytes
SHA-256: da1cee785ef1c5b0b3b445e871f6f41c5a26abcc1f59aa045f02e2e66c65be4b

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