Malicious PDF — malware analysis report

Static analysis result for SHA-256 814a4a1bf7c55c64…

MALICIOUS

PDF

34.5 KB Created: 2021-07-09 02:21:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2f1fef36f258b2a2943972c280282c00 SHA-1: c821a3a1bf6f046f96cbd90b801433e833df8f98 SHA-256: 814a4a1bf7c55c64ba54b0c21bae33214b3f843117b66f1faa93c336d9cf6ea7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a known malicious redirector. The document body and heuristics indicate a lure for game-related hacks or generators, specifically mentioning "Free Coin Master Gold Cards" and directing users to "http://netcdn.tw/app/406889139/free-coin-master-gold-cards-game-hack". This suggests an attempt to trick users into visiting potentially harmful websites, likely for credential harvesting or malware delivery.

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/free-coin-master-gold-cards-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-promo-codes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/2021-pastebin-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-real-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-save-in-free-draw-2-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-claimer_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/noob-vs-pro-vs-hacker-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/youtube-how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox-with-inspect_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-hats-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/real-robux-generator-2021_GM431946152.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D2 22568 bytes
SHA-256: 2621949ab7a204502aefa8924d47dfc88a6a81919decad054484c270e824eae3
font_01_sfnt_off00006424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6424 18244 bytes
SHA-256: fd4764d50ec251cdb3a7d4efd3c62b4862a6983ebe6024ebda45eac0790d3133

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