Malicious PDF — malware analysis report

Static analysis result for SHA-256 be44b5279fe30cd1…

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 09:08:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 16a713a3694016e57bbc783f22ef2f69 SHA-1: aaff2ff463f38ba857e031792a597a53db0071b7 SHA-256: be44b5279fe30cd1c949e0f01519fbc18d6b3c094a5738fe543ddc5fff483aa4
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game hacks and cheats. The primary URL, https://netcdn.online/app/406889139/master-coin-free-spin-game-hack, is a clear lure for potentially malicious content. The heuristic findings indicate this PDF is part of a link farm designed to redirect users to exploit or scam sites, likely serving as a malicious attachment in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/master-coin-free-spin-game-hack PDF link annotation
    • http://pustaka-smpn3tpi.com/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E0E 28228 bytes
SHA-256: b123b4ac7113e58c2ca87844cc327a3f36f127649e765e78a3aab02a8a52fde1
font_01_sfnt_off00008efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFB 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off00009898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9898 17884 bytes
SHA-256: 2eace5707960ab6674c345fc5925bb74d79b72c9d0e947ec779627780b9711cb

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