Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c888f2907d3b9c…

MALICIOUS

PDF

32.8 KB Created: 2021-07-19 07:21:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e7a9694360e38586a0ca7ddd6cd658df SHA-1: 0b965c7a4bb0fd512264719342f13b7287b8cd5a SHA-256: f8c888f2907d3b9cefe9d9cc8283fa67980284d8a4207ab9c0ea4885484fa67a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to redirectors, including a critical finding of a link to known malicious infrastructure. The document body explicitly mentions 'Free Spins For Coin Master App' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', indicating a lure for potentially unwanted or malicious content. The presence of embedded URLs and the nature of the lures suggest an attempt to drive users to malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/406889139/free-spins-for-coin-master-app-game-hack In PDF document text
    • http://omahahospitalityhalloffame.org/images/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://omahahospitalityhalloffame.org/images/minecraft-free-download-iphone_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
stream_002_off00002d18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D18 22516 bytes
SHA-256: 77d3be1ab306d2c3f754f90ba851bcfe09d772069ba683abd1df90c497fc34f7
font_01_sfnt_off00005f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F97 17884 bytes
SHA-256: c0e07e045f0496ba68af439e810d5bb13e23b0d850ef9426c095223eaa712aa7

Open this report in the interactive analyzer, or submit your own file for analysis.