Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d17faea1ad0105a…

MALICIOUS

PDF

40.7 KB Created: 2021-05-14 15:19:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 950406b140023a55a6c333c3ca08084d SHA-1: 71e8a38253f986c708bcc2e3fc266682788f1448 SHA-256: 9d17faea1ad0105a8b1178719c5bd9a2b3b2308cfd2f04693d10e1108606b07d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures for popular games. The document body, though partially corrupted, contains similar text and URLs, reinforcing the phishing pretext. The embedded links likely lead to further malicious content or exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-free-spins-cheat-game-hack In PDF document text
    • http://centuriatus.com/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://centuriatus.com/images/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/code-free-robux_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/roblox-source_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/easy-ways-to-get-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
stream_003_off0000475b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x475B 23812 bytes
SHA-256: 2d78806e1173566bb9668fc4987cf6177cbb710855cc400247cdbc031425f404
font_01_sfnt_off00007d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8F 18052 bytes
SHA-256: 9bd717b0e04310867829ca511b483eebbd60050a5b8b31305794fbcb17f8519e