Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a3b1090c57fc39…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 06:46:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 053fd5fec811ceda28c9c85c7a950095 SHA-1: d85dd59339a302d673ce361126299dabc7c4ad27 SHA-256: a2a3b1090c57fc394f07c0d397bc90f4206700009032c84b2f8749e8c2b82247
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting malicious sites. The primary malicious URL identified is http://netcdn.co/app/431946152/hack-vampire-hunters-2-roblox-fly-game-hack.

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/hack-vampire-hunters-2-roblox-fly-game-hack In PDF document text
    • http://library.futureuniversity.com/repository/dragon-ball-z-rage-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-bear-mask-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hacking-my-roomates-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/ninja-run-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-adopt-me-hack-all-items_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-hack-robux-sin-verificacion_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-hack-online-cheat_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/get-me-free-robux_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_off00003024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3024 21512 bytes
SHA-256: 27feabae0ab5023aa1316f259d4108ea473b65b67cdca80d45b640f3ebe9fcc0
font_01_sfnt_off00005f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F39 20056 bytes
SHA-256: b67116ea602d03b76f99283fcdf6b20772475f897af47a18f872e23390ab3810

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