Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e1d97891551cd4…

MALICIOUS

PDF

220.8 KB Created: 2021-07-06 02:48:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 59729b8578dbbd9d81380ce0c7d5da08 SHA-1: d097001000e9b9dbcf1693aa93f67d4573dda496 SHA-256: 58e1d97891551cd471d579d85f6a05a3600140362af6e15a94441e0fcc58d6a3
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generators" for popular games. The primary lure URL is http://netcdn.tw/app/1094591345/pokemon-go-for-free-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely intended to lead users to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.2223

Heuristics 3

  • 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.
  • 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/1094591345/pokemon-go-for-free-game-hack In PDF document text
    • http://lib.uho.ac.id/library//repository/pubg-uc-hack-online_GM1330123889.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-buy-things-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/app-hack-online-roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-items-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/4-tik-tok-free-followers_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00031bc7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31BC7 25576 bytes
SHA-256: ff8ecf15b7d0dccb6a291d69ac37f5cdcf07ad06524027a1a9f2a28fabf9f97e