Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb9d3e9db9287de…

MALICIOUS

PDF

48.0 KB Created: 2021-06-11 13:23:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ce730654442c8547a5dc743589f08e26 SHA-1: d05f2d5ed5abebc4cdec7d5fd7d0fcf563f3f089 SHA-256: 0fb9d3e9db9287de31a8b78d255eca983f39e543e682422dc0361aa1c0bcbcd1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that lead to a known malicious redirector, specifically advertising free in-game currency or hacks for games like Roblox and Coin Master. The document body and embedded links strongly suggest a social engineering lure to drive traffic to potentially malicious sites. While no scripts were directly extracted, the PDF structure and heuristic firings indicate malicious intent through redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.tw/app/431946152/how-to-get-free-penguin-in-roblox-game-hack In PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-robux-no-hacks-needed_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-hack-2021-computer_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/ar-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/roblox-legendary-football-hack-feb-2021_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_off000051b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51B4 31048 bytes
SHA-256: 735ade75eadc084e7329efac0bb851e8ad327cfe9ab490ad9d782e453adc88bf
font_01_sfnt_off000097a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A4 18916 bytes
SHA-256: 50079de486aac119b31a814611e804c46338dec6f2c60d3d15286a22ddb36b02

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