Malicious PDF — malware analysis report

Static analysis result for SHA-256 95edc19f663cd7ac…

MALICIOUS

PDF

44.3 KB Created: 2021-05-17 16:37:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 79d71ff8bc3604945d3d0d188607f166 SHA-1: c7a8b9643288630ad1622239f146eb724d36c446 SHA-256: 95edc19f663cd7ac9f4f904712a30f1275a9cacbef66fac4cc9a3728193e5514
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users with promises of free game-related currency or hacks. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/free-robux-images-game-hack In PDF document text
    • http://kermas.eu/images/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://kermas.eu/images/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://kermas.eu/images/www-roblox-com-free-robux_GM431946152.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
stream_003_off00004712.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4712 24548 bytes
SHA-256: 31e841f991c5bb87643c4f1ef255bd1b3a1149c7d61b70b216169ebdaa4b5e7a
font_01_sfnt_off00007f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F60 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8911 18792 bytes
SHA-256: a2580c58451f3b1d88c8ceab1016c43f7244c9e681afad5968b7c22bbe0132ae