Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ed94b467da7a06…

MALICIOUS

PDF

49.9 KB Created: 2021-06-09 12:34:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 316e3772673fa7878bd5820740d8f98d SHA-1: 577763209998619fcf3314bdb66144289971c5a8 SHA-256: 66ed94b467da7a06bea00d499bd888a0a3eff696d722d91774a3990050ad8c5a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs social engineering by luring users with promises of game hacks and free passes, directing them to a malicious redirector. The document body contains multiple URLs, including the primary malicious redirector, which is a common tactic for phishing or malware distribution. The presence of multiple redirector links and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/roblox-free-gamepass-hack-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/tiktok-free-views_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/nuke-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-is-being-hacked-9-21-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-cheat-on-roblox-twisted-murderer_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/raspberry-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-code-lua-roblox-hacking_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53DE 27324 bytes
SHA-256: 18378ee39f23d8fc4c0163c2c524a178dbfe30010e6251f9698f7a309d6e87de
font_01_sfnt_off00009274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9274 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1B 18780 bytes
SHA-256: 4db15c0b2b5247371d5981124f306a333eb550df6cb1b9e322a1bdfd17ab67ff

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