Malicious PDF — malware analysis report

Static analysis result for SHA-256 50232055287d5f99…

MALICIOUS

PDF

32.0 KB Created: 2021-06-18 14:23:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e479e9f70b0bcd217937988a67d35d2e SHA-1: d39327bf9705570eace859f6755fdf02dfece08c SHA-256: 50232055287d5f99ffd72f0c3e69b0628901f549438803853f9d3250648f62e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, masquerading as game hacks and generators. The document body explicitly mentions 'Free Robux Key' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', indicating a lure for potentially unwanted or malicious content. The presence of multiple redirector links strongly suggests an attempt to funnel users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/free-robux-key-game-hack In PDF document text
    • https://reggieslockandkey.com/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-slaying-simulator-hack_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-jailbreak-hack-no-virus_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/robux-hack-little-obby-studios_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-robux-hack-tool-no-survey_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-download-and-play-for-free_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/uirbx-club-free-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/hack-for-rpg-world-money-on-roblox_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-fast-and-easy-2021_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-roebucks_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/op-rewards-robux_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
font_00_sfnt_off00002919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2919 21920 bytes
SHA-256: 6f9d9e315ff1217ce416ce588aac6d0a0391299f1873f252fa096e117846d350
font_01_sfnt_off00005904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5904 18712 bytes
SHA-256: e7488446b0cef0014afd45749bd67abbec3d83a6d0fbfa5fe941a5d5603db4b0

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