Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4ff1061e43f810…

MALICIOUS

PDF

43.9 KB Created: 2021-05-11 17:22:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 88fd4cd28d5f7bdacdf8da06bdc402ad SHA-1: 8c206c584f59efc85cfdc5542d98718f296aa7c2 SHA-256: 7c4ff1061e43f8103c12ce1bcb47280f02e4778ce1e72347e866b76a01c99983
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising game hacks and free currency for popular games like Roblox and Coin Master. The document body, though heavily obfuscated, contains references to these lures and the associated URLs. The presence of these links and the heuristic firings strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/431946152/roblox-person-game-hack In PDF document text
    • http://mbbs.hr/files/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/robux-gratis_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-master_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4586 24420 bytes
SHA-256: e0ab11eb56c149618fece06cca12e1d176f9d40503b7639108950c261720d1fd
font_01_sfnt_off00007d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D61 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A09 17936 bytes
SHA-256: f4f04d29b57f2a72625fc9e352393071ee42f2c511d00c6ae5a127c0a3ffd084

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