Malicious PDF — malware analysis report

Static analysis result for SHA-256 863cda7f75bb28ba…

MALICIOUS

PDF

41.4 KB Created: 2021-05-19 22:11:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: dfa70eaf0e3e49adb152538fd98a7aee SHA-1: 2892a8bad73db64571fbcbd37a96ac1d41e2e600 SHA-256: 863cda7f75bb28ba8878963afbb4638636a3964458977830435841a0f9f4a730
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically targeting users with lures for game hacks and free currency. The document also displays a fake CAPTCHA or human verification prompt to trick users into interacting with the malicious links. The primary lure is for 'free Robux' or 'Coin Master' hacks, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/sites-to-get-free-robux-game-hack In PDF document text
    • https://reggieslockandkey.com/images/robux-redeem_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux-sites_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/tiktok-free-online-unblocked_GM835599320.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-system_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-clothes-on-roblox-2021_GM431946152.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
stream_003_off00004936.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4936 24084 bytes
SHA-256: d51cc24725ff5f58ac9d6ebeb0cd7a2177834cd24646f69def7d66485ad579c5
font_01_sfnt_off00007f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F54 18236 bytes
SHA-256: b3c6e6b81f0aade665b3e9e34fb665158f9d1803db8458128eb468a961d6d74b

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