Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3219b7da91f0e0b…

MALICIOUS

PDF

44.0 KB Created: 2021-05-17 09:01:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2669d3b472e76ff97f652d623a5e3373 SHA-1: aa70e1ba3e53f170fddfa0ea34ef4773968c4f8f SHA-256: e3219b7da91f0e0be2b79111e11223383fde3427ca0c1d617b888210d6da8785
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to websites offering 'free generators' or 'game hacks', a common lure for phishing or malware distribution. The ML classifier and specific PDF heuristics strongly indicate malicious intent. While no scripts were directly extracted, the document's structure and embedded URLs suggest it's designed to trick users into visiting potentially harmful sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/coin-master-free-spins-link-today-game-hack In PDF document text
    • https://topkoreamart.com/public/upload/files/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/more-robux_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/coin-monster_GM406889139.pdfIn PDF document text
    • https://topkoreamart.com/public/upload/files/mcpe-client_GM479516143.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_003_off000049b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B8 29020 bytes
SHA-256: 27539053ac28a0b0f905f9e038d69f2c2c391e4f795b5bf58f26da99e8d24502
font_01_sfnt_off0000893e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893E 18412 bytes
SHA-256: ee277532c3187caf3da016130e4cbd3fee848ac0b1174d0f40fc16c12ed3c41d