Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8f074e1074e78d…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 23:44:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8547045852cc169f7c67398713b8f562 SHA-1: f2e735606b63ac8591af54cfadedbc0f5439204f SHA-256: bf8f074e1074e78d89525cab082557a5e0f7ade69193edbc79528e226b4a303e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with promises of game hacks and free currency, redirecting to malicious infrastructure. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-hack-without-human-verification-2021-game-hack. This indicates a social engineering attack designed to trick users into visiting potentially harmful 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.tw/app/406889139/coin-master-hack-without-human-verification-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/cm-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-earn-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-admin-commands-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/project-pokemon-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-people-and-get-there-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-to-get-clothes-in-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-character-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-actually-hacks-on-roblox-not-a-model_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-how-to-hack-robux-with-cheat-engine-64-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coin-spin-coin-master_GM406889139.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_off00002b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B67 22160 bytes
SHA-256: ccc9a3a117dfda1cd990817532efcfde2c0b35e9d3bec01a9c2e737b1e303f71
font_01_sfnt_off00005c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C53 19304 bytes
SHA-256: f8861b3c9aaf8f1d50bee1847069a40ba50e39d84bb43402706f5c77a0ef7414