Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dffcd227f4aa522…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 21:05:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5c6286adcc3ac1de660a87bd8aca8f06 SHA-1: 3aefa8169bb010a75e32be32e9faac71cfa585bd SHA-256: 0dffcd227f4aa522042c9aa7ac80f1fd68d6c23ca9981c4631fca3ecc0c12304
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links disguised as 'free generators' or 'game hacks' for popular games like Minecraft and Roblox. These links, such as http://netcdn.tw/app/479516143/how-to-setup-a-minecraft-server-for-free-game-hack, are likely intended to redirect users to malicious websites or download further payloads. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/how-to-setup-a-minecraft-server-for-free-game-hack PDF link annotation
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/calamari-free-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/server-destroy-exploit-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-someone-password-in-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-shirts-on-roblox-2021-no-bc_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/fastest-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-can-i-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/tiktok-free-pizza_GM835599320.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-a-free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-into-somebodys-roblox-account_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/blogspot-free-spins-coin-master_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
font_00_sfnt_off00003478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3478 21952 bytes
SHA-256: 6b301d329c96e4bfa5b6d3b95b0a1eb08c596002f34579a7699a443c432a430d
font_01_sfnt_off000064b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B5 18592 bytes
SHA-256: 4b40ee072286608b3d74a0cb4ed346ad8a5977f91bfb22046a7a3c91dcad46b1