Malicious PDF — malware analysis report

Static analysis result for SHA-256 a165a704ac6eb203…

MALICIOUS

PDF

35.5 KB Created: 2021-07-06 10:36:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4987d80b8b16234cf6c2db0d60677e4a SHA-1: 025ac1c422062f09289cee108b972ea7ad03c4da SHA-256: a165a704ac6eb203885ac15c2760bd41220a56f9a29756dfd7a6e42be3c79c78
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-hack-download-android-game-hack. The document body and heuristics indicate a lure for game-related hacks, likely to download further malware or lead to a phishing site. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or malware distribution attempt.

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/406889139/coin-master-hack-download-android-game-hack In PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/tiktok-free-fire_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-on-laptop-easy_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-shred-money-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/skater-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-cheatsobc-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/como-hackear-coin-master-espaol_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_off0000335f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x335F 23052 bytes
SHA-256: a6b5ca148c42ed4266d204c9aea0f7f6f4c5a1122c54c2b6c36682db44361294
font_01_sfnt_off0000671b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671B 18584 bytes
SHA-256: 764db0c8bb3cc5d56384d8faf66ab9aae998b336e4984509afe0aadec95ec4ad