Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f16b81102d2cf9…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 04:26:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3658dc1db88b8ed5629b52ec8bb45c92 SHA-1: cc378b82dd233a113cee7a68d841c46d9b9fc78a SHA-256: 89f16b81102d2cf9812bff21134ae2927fc513430d1178d474c015e8533e2ca1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising "free generator / game hack" lures. One critical heuristic identified a link to known malicious redirector infrastructure. The presence of embedded URLs and the overall theme suggest a phishing or scam attempt designed to lead the user to malicious content or malware. No scripts were extracted from this sample.

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/spins-gratis-coin-master-hoy-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-accounts-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-do-you-get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hacking-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/blocks-of-war-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pubg-600-uc-in-pakistani-rupees_GM1330123889.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hackrar-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/games-that-give-you-free-stuff-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-promo-coes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-blox-piece-script-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-through-walls-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-gold-cards-free-2021_GM406889139.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_off0000366b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x366B 22680 bytes
SHA-256: 98ba05181fc493ce980a9aad5824ee75cf593d50711f435208e44a82c4cbbfb6
font_01_sfnt_off000068d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D1 18192 bytes
SHA-256: f0cb3e5f4dfe88bc40a90a65ebd818d218d5edb4fbfdc9be9603a0c52878bb4f

Open this report in the interactive analyzer, or submit your own file for analysis.