Malicious PDF — malware analysis report

Static analysis result for SHA-256 a605425cc6e311c7…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 14:57:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2ad6b5c60d126235e84e035299fa0452 SHA-1: b96c106d2830232e11f35e65edca488857a22301 SHA-256: a605425cc6e311c7267558be5f83fb17bdc31c00a625b39016578ffb28f0a773
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic identifying one as a known malicious redirector. The document body and heuristics indicate a lure for game hacks and generators, specifically mentioning 'Coin Master'. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-blogspot-links-game-hack, which likely serves as a gateway to further malicious content or exploits.

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-blogspot-links-game-hack In PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-do-i-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/get-easy-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-that-works-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/cheat-roblox-lifting-simulator_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hacks-for-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-robux-from-3-invites-free-nitro_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-download-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-codes-2021-september_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-spin-link-for-coin-master-game_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_002_off000031d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31D7 22720 bytes
SHA-256: 4eecb92888f8a45a7251b2b6d7c7ec86ca5b01d7c937b8aa3800f7624dacfd9a
font_01_sfnt_off000064b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B4 18472 bytes
SHA-256: c615bd6496d0d9fb6cf20dea558ce4077100b4d17ed7e8289feb1170a68b622a

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