Malicious PDF — malware analysis report

Static analysis result for SHA-256 254fff8f54e018d0…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 04:13:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6840caec2aa44fd2f58e3ca97cd29a58 SHA-1: 8beb6ae9e850dccc1f17231379507a1b118aa244 SHA-256: 254fff8f54e018d097d2f7ee8568cdc14c446258509c67d46bb93f6d7b6d6502
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary link, http://netcdn.tw/app/406889139/coin-master-hack-online-no-human-verification-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect the user to a malicious site, likely for further payload delivery or phishing.

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/coin-master-hack-online-no-human-verification-game-hack In PDF document text
    • http://www.hlad.hr/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-obc-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-hack-2021-free-download_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/comment-hacker-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-cheats-for-robux-and-tix-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/robux-sites_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/lemon-aid-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/memcorrupt-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4C 22980 bytes
SHA-256: 143a0749646e8f4a3e3ecde52f34deb75beda8d2fa90400fb7a64f2f0131c5ff
font_01_sfnt_off000062df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DF 18612 bytes
SHA-256: 338fae3f97a5e5398a6cf0b8c994910b70de825f0c392734b88d1d7319a72caa

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