Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bbc5a9fda7aa0c2…

MALICIOUS

PDF

51.5 KB Created: 2021-06-11 13:09:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a33a67c04bd7b35f5fd97786102e55ba SHA-1: a45cae10748ee844d11ea36aee309f27ff54061a SHA-256: 3bbc5a9fda7aa0c2a4b3397051ef9931c7633df56bea49556b66a2790cae767c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free game hacks' and similar lures. The document body, though heavily obfuscated, contains a URL that aligns with the heuristic findings. The primary goal appears to be redirecting users to potentially malicious websites through social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

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 https://netcdn.tw/app/431946152/change-name-on-roblox-for-free-game-hack In PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-hacks-mod-menu_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-no-verifying_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-report-a-roblox-hacker-that-was-banned_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-how-to-get-free-faces-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/ninja-legends-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-dope-characters-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52DF 25940 bytes
SHA-256: e4e1bb100626a97dffb2c70bc84859d0ece79e0851c36be58f396de830cd3724
font_01_sfnt_off00008dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD9 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off00009793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9793 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4A5 18888 bytes
SHA-256: 6ce5230f262864a69033fca4b71c33766edc1086aa5453a980d51eac2b47867d

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