Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce9764b222f8603…

MALICIOUS

PDF

36.9 KB Created: 2021-05-21 00:39:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2cb0cda3a4be952326f8b5ccd765d7af SHA-1: 4ed8c859a56fc1ceecf9703c98b1f331b13ca1e2 SHA-256: fce9764b222f8603750959b542f1110580f63394037b910ad2b80639077e2b22
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains that ultimately lead to pages offering 'free spins' or 'hacks' for popular games, a common lure for malware distribution. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest the primary goal is to trick users into downloading a second-stage payload.

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/406889139/coin-master-free-spins-link-download-game-hack In PDF document text
    • http://xenonsvjetla.com/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/tiktok-free-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_002_off00003467.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3467 24880 bytes
SHA-256: 5514d294faf7e504ed5c14246d8e05023448e2cda9e5789fa1a53d78d1bca768
font_01_sfnt_off00006dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC5 18636 bytes
SHA-256: e0ee4d28e9fbd90893640acb023fdb3433a7d18e360fd79b0a1965f7934d0c46

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