Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc7d936846c178b…

MALICIOUS

PDF

43.4 KB Created: 2021-05-12 14:06:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f45a3f8061712ce4d732f37f66a604c5 SHA-1: 6b00ceb719a25a1cc2754494a5e6d65add64bb42 SHA-256: 8cc7d936846c178bccfa968a41b41a7ba0eb5bd0a51d2b202f7926a07ad09ebc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs that lead to known malicious redirectors and pages offering game hacks and currency. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. While no scripts were explicitly extracted, the nature of the embedded URLs and the lure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/robux-fun-hack-game-hack In PDF document text
    • http://clubpure.org/images/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/roblox-generator_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://clubpure.org/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://clubpure.org/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://clubpure.org/images/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://clubpure.org/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://clubpure.org/images/coin-master-viking-quest-hack_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_off000046d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46D6 27748 bytes
SHA-256: afa7154bbd2cd3968f19a7b7222f2b63ff052fb9a821177de5105e992dbaca92
font_01_sfnt_off0000871b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871B 18412 bytes
SHA-256: 5f8acd8ad37749349105b070ed73c2c3c7a96b7e2283405d761bfe738e73485c

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