Malicious PDF — malware analysis report

Static analysis result for SHA-256 86bce5fa9d8e556d…

MALICIOUS

PDF

36.4 KB Created: 2021-05-21 10:39:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c6a78271a3023ba6f6ab5ab529384c42 SHA-1: a20d3e9510c4df6ab9fe60b1fc1d5f1df6f7c09c SHA-256: 86bce5fa9d8e556dfc1537233749b5222764f419d725bfdbe2d646ee9bcab75a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector infrastructure that is known to host malicious content, specifically lures for game hacks and generators. The document body includes phrases like 'CLICK HERE TO ACCESS ROBLOX GENERATOR' and links to various 'free robux' or 'coin master' related PDFs, indicating a social engineering attempt to trick users into downloading potentially harmful files. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a malicious redirector and download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/free-roblox-clothes-boy-game-hack In PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-coin-master-s_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
stream_002_off00003215.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3215 25840 bytes
SHA-256: c72835ce051feaed1c6fa54d9dda845fb7fc8837c166114cd8f0e7813540af55
font_01_sfnt_off00006c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9B 18400 bytes
SHA-256: ff0928d05cd2328f5f6db263fee94a7b5023d77c4cae175890f1311eb4a8d902

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