Malicious PDF — malware analysis report

Static analysis result for SHA-256 90539701fea976b1…

MALICIOUS

PDF

41.4 KB Created: 2021-04-27 06:50:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 617fb785c9def5489feae092a4df9a70 SHA-1: df482e7fbbfd91ce93c61d2af29384fad61fdac1 SHA-256: 90539701fea976b1d12b547d11508f400c65334af644c787b1b251ce26f58d51
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, which is designed to lure users into clicking on it under the guise of a game hack. The ML classifier strongly indicates maliciousness. The presence of embedded URLs and the specific heuristic firings suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/apoculopse-rising-roblox-hack-script-spawning-game-hack In PDF document text
    • http://www.saburai.ac.id/elibrary//repository/cool-tshirts-for-roblox-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-hack-into-files-to-get-robux.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/daniel-hack-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/create-own-free-skin-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/robux-hack-no-human-verification-android.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/download-games-to-get-free-robux.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/april-fools-roblox-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-cheat-engine-wall-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-clothes-roblox-ipad.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
stream_003_off000040fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40FB 25896 bytes
SHA-256: 76da8bcb399e557869d4c391e0df55b184ab700bacdc8ce680df71a1ebacefb9
font_01_sfnt_off00007d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D73 19176 bytes
SHA-256: 082af945c69719d3223043b1ec61d472c18decf5e8061cccceb4f6b981b43023

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