Malicious PDF — malware analysis report

Static analysis result for SHA-256 a58ec205779c2448…

MALICIOUS

PDF

33.8 KB Created: 2021-06-30 04:58:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1d27407c7c8537edd19b0261ac4775ba SHA-1: bfaf89af85c0d4c852edd0b6af30770d10a7a41d SHA-256: a58ec205779c24487766dabe8fa1fa18855996a4a24c36b7625ae2ed4b5e5a43
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting free game hacks and currency generators. The ML classifier strongly flagged this PDF as malicious. The presence of multiple links to similar lure content suggests a phishing or scam campaign aimed at users seeking in-game advantages.

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.co/app/431946152/free-roblox-battle-royale-game-hack In PDF document text
    • https://jas8.com.tw/image/data/files/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-e-free_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-how-to-equip-your-free-wings_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-hack-roblox-i-dont-feel-so-good-simulator_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-com-2021_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_off00002ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDF 22156 bytes
SHA-256: 2e2e62618fdf1ceea257cb3ca104982090005d3493ba99adbdc22caec65d671d
font_01_sfnt_off00005f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F09 18936 bytes
SHA-256: 64d1364da4133385a8e8c08861ef725c6fc609ccf1140e97a5b07c3b0c14395e

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