Malicious PDF — malware analysis report

Static analysis result for SHA-256 71a6fdd7803de7b5…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 19:28:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4d6604bc9259283ba6e99ddd44802e05 SHA-1: df44cb1e214d617d559902affc4d55ebefca1a9e SHA-256: 71a6fdd7803de7b5cd2a178b10da0cec29f31efc16b6fd268b43293b76c40d16
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free in-game currency. The primary link, http://netcdn.tw/app/431946152/free-robux-cards-game-hack, is flagged as malicious and likely serves as a gateway to further malicious content or exploits. The document's structure and content strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites.

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/431946152/free-robux-cards-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/change-roblox-username-pastebin-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-roblox-on-pc_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/master-coin-free_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-do-you-hack-people-on-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-and-easy-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-roblox-for-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-hacks-project-alpha_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-pet-simolator-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-catalog-things-you-never-knew-existed-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-hack-ohne-verification_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/meney-hack-jailbreak-roblox_GM431946152.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
font_00_sfnt_off000031b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B7 23008 bytes
SHA-256: 46765b7e63498da7d5aaf7e394b2f13853652ab9457a0b0328951bca92cb8919
font_01_sfnt_off0000655e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655E 18888 bytes
SHA-256: 6c6de0ceaed5fc014d3dcce92ca1cb896bf7995edf6e50a0e815779b2f83a656

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