Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5a9d38fb19de32…

MALICIOUS

PDF

45.2 KB Created: 2021-06-13 22:29:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a897019f99d9273e1017150de881d5da SHA-1: 0fdf8f7644e77780627320d6649faecdf11f799f SHA-256: 2f5a9d38fb19de3227283e5ab16853c93d4330f97aa4fc0f6c2c963444ead784
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to malicious infrastructure. The document body and heuristics indicate a fake CAPTCHA or human verification prompt is displayed to trick users into interacting with the malicious link. No scripts were extracted, but the embedded URLs and redirector findings strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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
  • 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.co/app/431946152/get-free-robux-by-entering-thid-birthday-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/best-free-roblox-skin_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/pokemon-go-free-zoom_GM1094591345.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-steamy-xxx-videos-lol_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-free-exploit-that-support-fireclickdetector_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hacking-roblox-thumbnail_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-compagnon-roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/cheat-engine-change-server-value-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-and-free-coins_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_off000047e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47E0 28540 bytes
SHA-256: 016269dae5747031c7b4f2b642b4c44328e9377f4abda5e8c1cf90e4e3abaab7
font_01_sfnt_off00008b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7B 19276 bytes
SHA-256: a177a6e882165a9a42a3733a8fa4106a84688f4aa3dc3b4dc7595f91a28b0b9e

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