Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f89d5de4b26f3b…

MALICIOUS

PDF

34.1 KB Created: 2021-07-19 16:39:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5e9481585cd3b2b41b1962aa4be97af1 SHA-1: aebce7143f8cae48fb1b5b046e4d3e0120fbc093 SHA-256: 11f89d5de4b26f3b6cb6d0db5809d50659ab2d473fd1fdf0d6afb40942f8c58f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body and embedded artifacts suggest a lure related to Minecraft and other games, aiming to trick users into visiting these malicious sites. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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/479516143/minecraft-pe-free-apk-game-hack In PDF document text
    • http://pesok-rk.ru/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-tiktok-like_GM835599320.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://pesok-rk.ru/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-printable-minecraft-coloring-pages_GM479516143.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
font_00_sfnt_off0000314d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314D 22804 bytes
SHA-256: 64b06427bc3871c3563f1438008e4a3df34df6f8018d099f745b41f678ec9081
font_01_sfnt_off00006435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 18068 bytes
SHA-256: 35104518e66c8492531759eb706d86fdb36771bd3dd1e1625049e5bd6be6693d

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