Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8666f491ffb827…

MALICIOUS

PDF

45.7 KB Created: 2021-05-14 11:57:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a29e41e14531ef4606fde09129505c5a SHA-1: 2b17d9b8bd1c3a3bd5f5e17891275c6519a3c5c2 SHA-256: 6e8666f491ffb8277767240dcbe242f5685e9bc7ca3c3966f67aa30b419b5467
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 generator / game hack' lures. The primary redirect URL is https://netcdn.xyz/app/406889139/free-spins-and-coins-coin-master-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-and-coins-coin-master-2021-game-hack In PDF document text
    • http://tah-li.com/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-spins-hack_GM406889139.pdfIn 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_003_off00004828.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4828 26836 bytes
SHA-256: 4e1653e4b4abc691152f31d2e29616d678da5fc09e354adfde727c1aec0054cf
font_01_sfnt_off000085df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85DF 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F90 18460 bytes
SHA-256: 9f443343d33dd80abfdfffa9dfb60a36fd2beaa647f06f075f3e145f27f8847c

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