Malicious PDF — malware analysis report

Static analysis result for SHA-256 852313ae149ab14c…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 23:28:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c073c3b26046a5849917468212f0efb9 SHA-1: bbf4aeb7ad92c6b6086ce31e6217d89c19ee506f SHA-256: 852313ae149ab14c44f32a078e22d5f398154541b678029aa1af3ed25f30a55b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux and game hacks, directing users to malicious redirector URLs. The heuristic firings indicate that the PDF links to known malicious infrastructure and is designed to trick users into clicking on these links. While no scripts were explicitly extracted, the nature of the lures suggests a phishing or scam attempt, likely leading to further malicious content or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-800-robux-code-2021-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-account-bugmenot-wiki_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/robux-now_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-lebansay_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/eastbrook-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-generator-download-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/synapse-roblox-hack-free-download_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-gamepasses-script_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-play-minecraft-for-free-on-computer_GM479516143.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_off00002eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB9 22056 bytes
SHA-256: a17236849a99d1c4aa5a0db8e3d97ed9a78d2c4afbe5172eeeeb1b4efc337590
font_01_sfnt_off00005fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBD 19500 bytes
SHA-256: 600a5a48bab204cab019c1a822a3cb3bf60469ad777ce1f22ef10044359393b1

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