Malicious PDF — malware analysis report

Static analysis result for SHA-256 559f78c07342fa8b…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 13:12:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d55680dbe2babd08a5cd6e60c034c031 SHA-1: e94bd306b51d12975b1348f84e7fbe52fd802f53 SHA-256: 559f78c07342fa8b7ed8dd114182220191c10952a0a2da3bf962a521d8722c9e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and free currency generators. The primary lure is a link to 'coin-master-free-spins-and-coins-today-gift-reward-game-hack', which is hosted on known malicious redirector infrastructure. The document's content and embedded links strongly suggest a phishing or scam attempt to lure users to potentially harmful websites.

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.tw/app/406889139/coin-master-free-spins-and-coins-today-gift-reward-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-free-robux-simulator_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-you-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/slurp-cheat-in-roblox-download_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-roblox-steven-s_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-hack-no-human-verification-or-offers_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-hack-roblox-big-brother_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-prison-life-hack-mac_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-treelands-free-uncopylock_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/ho-to-get-free-glowing-skirt-on-royale-high-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-mad-city-hack-download_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-paypal-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/fps-free-games-best-on-roblox-2021-easter_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-be-a-hacker-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-private-minecraft-server_GM479516143.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
font_00_sfnt_off0000353e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x353E 22848 bytes
SHA-256: 92829a00d9de95362ea087a009cd967eb82fb17200af807e9d8a5a06f3e6515e
font_01_sfnt_off00006876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6876 18692 bytes
SHA-256: d31088ae19f241ea86c3227f133fc8e6698cecaa627da06b5b2cde690df300ac

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