Malicious PDF — malware analysis report

Static analysis result for SHA-256 9245f714f6fa5284…

MALICIOUS

PDF

41.2 KB Created: 2021-05-12 14:26:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 15a68c2b8266a144a9ec2d298daa4e98 SHA-1: 6c7bc3096a6d9f9c4390f9d4e2fe12555c8872f7 SHA-256: 9245f714f6fa528442774c2149f7113066ac7ee63a69a7983015a3fd9831e135
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appear to be game-related hacks or generators. The heuristic firings indicate these links point to malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for JavaScript execution or redirection to malicious sites, aligning with a phishing or scam attempt.

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/how-to-earn-free-spin-in-coin-master-game-hack In PDF document text
    • http://linens.kiev.ua/images/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/xray-hack_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://linens.kiev.ua/images/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://linens.kiev.ua/images/coin-master-free-coins-link_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
stream_003_off0000472f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x472F 24632 bytes
SHA-256: 6a12225dbdf2699790ddd4357b0a030ee084ebeac8e9584e1e99906ac07398b5
font_01_sfnt_off00007f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F65 18052 bytes
SHA-256: c8469be4e135a939fdcd4d5c4316a8d7a284a9925859706409da67ce72f50dba

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