Malicious PDF — malware analysis report

Static analysis result for SHA-256 565dd5aa9c437103…

MALICIOUS

PDF

46.0 KB Created: 2021-05-20 03:59:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f367c3f6a9ea435b1ebd466b687eaedf SHA-1: ebfe2a89f506079b46c7bb734b13df52911b3b50 SHA-256: 565dd5aa9c4371036f3b89debe76b1519229fd8e2d059848e185150f01308e42
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of 'Free Robux Giveaway' to entice users. It contains multiple links, including one to a known malicious redirector infrastructure at `https://netcdn.xyz/app/431946152/free-robux-giveaway-live-game-hack`. The presence of these links and the ML classifier's high confidence score indicate a strong likelihood of this document being used to deliver a second-stage payload or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-giveaway-live-game-hack In PDF document text
    • http://www.homesweethome.pl/images/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-online_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/tiktok-free-view-your-liked-videos_GM835599320.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/get-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/minecraft_GM479516143.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_off0000498e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x498E 26680 bytes
SHA-256: 3ab2433212d58843b32886151fb5d5a2dd7ce7caa7d4e79634a311cdd27d28a6
font_01_sfnt_off000085f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F9 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00008f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F99 18820 bytes
SHA-256: 3db94d24ba3abe2bdb9d310b65f8480e65e9005ffe127367b6d2ef8ae08c9d7b

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