Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4584b1b0ea0894…

MALICIOUS

PDF

33.4 KB Created: 2021-06-26 14:09:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ec4f0af4e3a49e597e1152cf71720df6 SHA-1: ab01caa7ff5cfc3b1af1c149c3e2a7e6967cd4fa SHA-256: ff4584b1b0ea0894b7b83597d7f6930c22c61cb0a1100a841a29f90ad6f29431
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 redirector URL is http://netcdn.co/app/431946152/free-roblox-lvl-7-download-game-hack. While no scripts were extracted, the document's structure and embedded URLs strongly indicate a phishing or scam attempt designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/free-roblox-lvl-7-download-game-hack In PDF document text
    • https://au-ma.com/image/data/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-hack-roblox-accounts-with-cookie-venom_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coinmaster-hack_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-builders-club-hack-no-download_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/indieun-free-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/paytm-to-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://au-ma.com/image/data/files/a-lot-of-robux_GM431946152.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
font_00_sfnt_off00002ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB8 22504 bytes
SHA-256: 869cd3861c0cd05b0cae73a3408d103209875e5cf250992f045d104e98b854dd
font_01_sfnt_off00005cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF0 19324 bytes
SHA-256: 0dbc97d70f9bb03e9bff6622fa778c55553cb43ca69ed78eb4947c497e1ba270

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