Malicious PDF — malware analysis report

Static analysis result for SHA-256 819ebf27dfe33f99…

MALICIOUS

PDF

43.5 KB Created: 2021-06-10 21:25:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1c644ca4603c81ab8fec0d366fd68d5c SHA-1: d6272774fa184febf058dd16bb61e58690d40be4 SHA-256: 819ebf27dfe33f9939f1c61b360b3264b025bddfe3ac775bc90747d62f441ecf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "game hacks" or "free currency" lures. The primary link directs to a site associated with game cheats, which is a common pretext for phishing or malware delivery. The document body, though partially corrupted, contains embedded URLs that further support the malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/hack-the-plaza-roblox-game-hack In PDF document text
    • http://io24.com.ar/images/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/get-free-robux-denis_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-do-you-get-builders-club-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/pokeballs-in-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/how-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-deadzone-hacks_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-hack-money-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-hack-ghost_GM431946152.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_004_off00004f07.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F07 24196 bytes
SHA-256: 03bcbfbe7e7d5215d56767cf5ca3fc61444ee46517b52b3558004c69a7b8f395
font_01_sfnt_off0000863a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863A 18584 bytes
SHA-256: 077226ea3d751525efbbf70553e6830b24b8f3766bbe6ca143aa5599ba79719f

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