Malicious PDF — malware analysis report

Static analysis result for SHA-256 17be535fc5b747cb…

MALICIOUS

PDF

51.8 KB Created: 2021-05-13 16:43:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8bfb74c1f002e3d0788e2aa9ba9f080e SHA-1: 07aa448690b88b3e1592bf108d855dc22f4a2ccf SHA-256: 17be535fc5b747cb12a37450b66cd64963fd45f35aa08710de67f4852cac69b8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and game-related lures, such as 'free Robux' and 'Coin Master spins'. The primary malicious link identified is https://netcdn.xyz/app/431946152/flame-gg-free-robux-game-hack. The document body and embedded URLs suggest a phishing or scam attempt designed to lure users to malicious websites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9300

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/flame-gg-free-robux-game-hack In PDF document text
    • http://centr-expert.su/images/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-game_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-free-spins-link-2021-today_GM406889139.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_off00004c83.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C83 27548 bytes
SHA-256: bf2979313d91f80b700b1eb55244f5c9ce1a66811bdd113e945871352ba649f6
font_01_sfnt_off00008bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBC 8376 bytes
SHA-256: 092b7a11ef2af93d0b61b37032e6f669359ea7bc5bcb682d43a712f599a5ca39
font_02_sfnt_off0000a68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA68B 18864 bytes
SHA-256: a12d67d537c0c2cb89f37f7f05ea7de5b6c0986bd532439e1b20da8093887b01

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