Malicious PDF — malware analysis report

Static analysis result for SHA-256 a571799608c869db…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 13:19:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: da36223269ffb2af3d6d9f0869fd6990 SHA-1: 6d25379f642126b6aff2ec9dc4142cd1e8745052 SHA-256: a571799608c869db98f50e09b02543cfa07c30535c39fad1fabc40f19068d255
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The document body and embedded URLs indicate a lure for free game items or cheats, which is a common social engineering tactic. The primary malicious URL identified is http://netcdn.tw/app/431946152/roblox-avatar-com-game-hack, which is flagged as a known malicious redirector.

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/431946152/roblox-avatar-com-game-hack In PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-star-wars-first-order-cheat-engine_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-hack-2021-pc_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/download-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/cheat-aimbot-roblox-mdiafire_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/conseguir-robux-gratis-hack-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-hair-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-project-jojo-white-snake-free_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-roblox-gift-card-giveaway_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-no-human-verivication_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-download-for-windows-7-free_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-online-building-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-on-roblox-no-hacks-joshy_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
font_00_sfnt_off00002f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5E 22208 bytes
SHA-256: 31375081e094f2ac8eed6ad26a78bf7c39499bc597b3d2dc2717e3fb1c92626e
font_01_sfnt_off000060a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A8 18964 bytes
SHA-256: 6c73279a6f200e59a6bfd18b793709ba0d2b202440332040bd73c13792b6dc5b