Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa87159406d5e349…

MALICIOUS

PDF

34.8 KB Created: 2021-06-30 09:39:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2004c230db0445275cf9b0d7c6fa74cb SHA-1: 822a19bf7bc12e89fab3d63a84f9de9a512a7c30 SHA-256: fa87159406d5e349b7b9152432a00bc8aab663461c19ba57290dabbbc9b436e6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure appears to be related to Roblox and Coin Master, aiming to trick users into downloading potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

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/hacks-for-twisted-paintball-roblox-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-tons-of-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-apk-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-robux-hack-cheat-engine-62-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/adonis-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-for-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-robux-no-hack-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-promo-codes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-no-human-verification-20212021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-adopt-me-free-money-glitch_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/fastbucks-me-roblox-free-robux_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
font_00_sfnt_off0000307e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307E 22160 bytes
SHA-256: e1311e8975874b5aa93d3c03d60f353198003df18a5615beedd926bc4e1bab48
font_01_sfnt_off000061af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AF 19536 bytes
SHA-256: 42bb4604229d3ec63f0ef8907f23cb5f1cc4befa0518ca61752a95501e865e21

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