Malicious PDF — malware analysis report

Static analysis result for SHA-256 294901e1d5582df1…

MALICIOUS

PDF

34.6 KB Created: 2021-06-29 04:17:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b2d90c80ce0d2515adb976b019e8ea9e SHA-1: 8e04aebc8acae2805346f0765ba0493dddf1c507 SHA-256: 294901e1d5582df1822ca6b7e97ddd128612c773fa34ea8fb3aa9b27347f0303
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple embedded URLs, with a primary focus on luring users with promises of 'Free Robux' and 'game hacks'. The heuristic firings indicate that the PDF links to known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/free-robux-omg-game-hack. The document body, though partially corrupted, reinforces this lure with similar phrasing and URLs. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/free-robux-omg-game-hack In PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/hacks-para-roblox-pc_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-mod-oder-hack-new-version-apk_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-roblox-exploits-loadstring_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-how-to-get-dominus-hat-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-visit-bot-free-trial_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/cheat-codes-for-zombie-apocalypse-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-18-000-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/hack-roblox-cheat-engine-67_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-free-robux-no-hack-or-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/crazy-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/noob-vs-pro-vs-hacker-roblox-bloxburg_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_off0000308d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308D 22824 bytes
SHA-256: ecff59ab37d5a32b7dedc6f5741b0070600254586be322d0001424eca9a6c8d0
font_01_sfnt_off00006299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6299 18976 bytes
SHA-256: 857cf6d4ab102ab976f21247144334bea5fcceebb76deb3c50704cc8ce14dc16

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