Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12b79d728873631…

MALICIOUS

PDF

44.3 KB Created: 2021-06-04 00:21:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c887d9a307aa0a510834dbc48b8dc2b2 SHA-1: 32a5aeb674ae6b895a8a4b834a87523124d58680 SHA-256: a12b79d728873631c9d7c801d56d8619de04dc20d6fa7726a9297536f6510288
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector. The document body and heuristics indicate a lure for game-related cheats or currency, combined with a request for sensitive recovery information. This suggests a phishing or scam attempt designed to trick users into clicking malicious links and potentially revealing credentials or private keys.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.online/app/406889139/coin-master-free-spin-link-today-50-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/pokemon-go-free-coins-no-survey_GM1094591345.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-1-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
stream_004_off00004e13.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E13 26100 bytes
SHA-256: f3aa4f69d57d54a5a8dc8f253430463b7acb5d00fb2aa62d1a4076a5beff908f
font_01_sfnt_off00008923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8923 18716 bytes
SHA-256: 34d71a1e16074585b92cedabb87dd12f76b262856d377b8410846490f9b2f930

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