Malicious PDF — malware analysis report

Static analysis result for SHA-256 3195cd2c40d84ab4…

MALICIOUS

PDF

48.0 KB Created: 2021-06-10 12:12:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fed5ae93a03cfc35fef7824839688aa1 SHA-1: a6d576215c10bb40b88c57cb59f0c9495cd9e1ce SHA-256: 3195cd2c40d84ab466604751500cbca5668cbdf468db11e4eabefecf4b6f15c1
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to trick users into interacting with malicious content, as indicated by the 'SE_FAKE_CAPTCHA' heuristic. The document contains multiple embedded URLs, including one pointing to a 'free generator / game hack' site, suggesting a social engineering tactic to drive users to potentially malicious content. While no scripts were explicitly extracted, the nature of the lure and the embedded URLs strongly suggest an attempt to deliver a second-stage payload or redirect users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/where-in-roblox-can-i-find-free-gems-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/free-robux-generator5_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-easy-fast-legit_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/earn-robux-today-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005130.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5130 25440 bytes
SHA-256: dae65c10e09940ed1970a35d2c3753e4f50dc324f904c8f85b204702e3d1a7f1
font_01_sfnt_off00008c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7A 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9689 19092 bytes
SHA-256: 13f7832dfda8a7b18e28d8cdb28f530ac52c70b66cd12c443ca04be17d135cb1

Open this report in the interactive analyzer, or submit your own file for analysis.