Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc773552a90c98c…

MALICIOUS

PDF

43.9 KB Created: 2021-04-27 10:23:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2c26dc5b62ca48f19954a636a924e95d SHA-1: bc6c61296dcaaff543f8072789b735c71f93b713 SHA-256: 3fc773552a90c98cea335a593d5f3bf735567a56615f001668c36acfbc7046f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising game hacks and generators for popular games like Roblox. The primary malicious URL identified is https://netcdn.xyz/app/431946152/wall-hack-phantom-forces-roblox-game-hack. The document body and embedded URLs suggest a lure for users seeking cheats, which is a common social engineering tactic to deliver malware. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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 https://netcdn.xyz/app/431946152/wall-hack-phantom-forces-roblox-game-hack In PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-dance-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/descargar-programa-para-hackear-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/using-cheat-engine-on-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/bhop-hack-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/daily-free-robux.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/hacks-para-infinity-anime-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-uploader-roblox-exploit.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/hack-roblox-vehicle-simulator-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/infinite-money-hack-roblox-jailbreak.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/can-you-go-to-jail-for-downloading-hacked-on-roblox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000040b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40B6 26224 bytes
SHA-256: 6f21ee114f6c5bb7479f0d91388238fe3d7733f46706224b4a3be1e7e628e116
font_01_sfnt_off00007d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7F 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8741 19228 bytes
SHA-256: ce5f851b74851c3de4379705fe1efcc3d56b4685de4a99c99f8705f050c1af89

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