Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a161182b9650867…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 16:03:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: dd440e6521166badf34fca08db0be67a SHA-1: f44f1b9d56fbd6d833cd5a33d34dc651826379d0 SHA-256: 3a161182b96508679577e9e215e7e56fa922880f894e9d67271ca79ab91efee5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, specifically advertising 'game hacks' and 'generators' for popular games. The primary lure URL, http://netcdn.tw/app/406889139/how-to-play-coin-master-game-hack, is flagged as malicious. The document body and embedded links suggest a phishing or scam attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/how-to-play-coin-master-game-hack In PDF document text
    • https://www.summerland.com.tw/upload/files/hack-roblox-apk_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/pokemon-go-free-or-gotcha_GM1094591345.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/when-you-get-hacked-on-roblox-rage-quit_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-fly-hack-download-free_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/proxo-descargar-roblox-hack-we-are-devs_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-roblox-account-generator-old-account_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-attach-to-debugger-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-exploit-scripts_GM431946152.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_002_off00002ecb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2ECB 23236 bytes
SHA-256: abeeae89ec4c3f1c29d4dc755e883338b1fee8bf2c4210d9d30b75942258985d
font_01_sfnt_off00006328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6328 18408 bytes
SHA-256: 3b2f09d393865f443ac77f83d1bd45853fd87f64807cf9613f9662034d73f856

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