Malicious PDF — malware analysis report

Static analysis result for SHA-256 d135a8d8d68bc42a…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 13:57:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d2f056d5a0eedadb600022b2c55245ae SHA-1: 08426e790f6037d506f829a1cafebb1cb892aa1b SHA-256: d135a8d8d68bc42a679eca19e64b7181f5c647bf3370b763a3d0db74551a7b17
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure URL is http://netcdn.tw/app/406889139/how-to-get-to-village-3-in-coin-master-game-hack, which is flagged as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting these sites, likely leading to further malware downloads or exploitation.

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-get-to-village-3-in-coin-master-game-hack In PDF document text
    • http://fkunismuh.org/perpustakaan//repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/filtered-v12-roblox-cheat-download_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/ear-robux-free-no-scams_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-hack-the-chat-roblox-no-download_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-apk-hack-uptodown_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-images_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-robux-for-free-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-free-download-android_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000325c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x325C 22760 bytes
SHA-256: e20685dd39d6f495276feb619cb920c7c47e927a13c2a52b1b1da5deca62ef49
font_01_sfnt_off0000652d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652D 18380 bytes
SHA-256: 719c44d621eea83d2118d585285fa0da07fb34d8e905b2248b9284b96b456eb4

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