Malicious PDF — malware analysis report

Static analysis result for SHA-256 d36ee66d557602e3…

MALICIOUS

PDF

36.7 KB Created: 2021-05-23 14:36:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 28b227eb5e99cd25c9385a251b78504d SHA-1: 30e3483c20438e8235b8a97665890460a6ca3138 SHA-256: d36ee66d557602e3e206ef2a71acc67a478c56ece05d35778060f10014cab85e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a 'free Robux generator' lure, a common social engineering tactic to trick users into visiting malicious websites. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-generator-no-human-verification-2021-game-hack In PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000307b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307B 25140 bytes
SHA-256: baf8c7fe4c504cdedc1afe371dc69ed15f646102b78a84cd2c3b092328a88d55
font_01_sfnt_off00006b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B07 19260 bytes
SHA-256: cfeb00e99c7da41c79bd6814c2de1bf58f441159bdfe452787b9448ffd27beb4

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