Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd38ef057a34212d…

MALICIOUS

PDF

33.4 KB Created: 2021-07-20 04:52:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 28d72e967f934a5b3ea29c5044cbcf15 SHA-1: 01da0a3038b0827e9d6da197d655a34d6d2f3ba1 SHA-256: cd38ef057a34212d77e3105e44c96852cbadd7eb60dab6ef3a2d530e32359c8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains links that redirect to malicious infrastructure, specifically advertising 'Roblox Hack Me' and other game-related cheats. The heuristic firings indicate that the PDF links to a known malicious redirector and uses a lure for game hacks. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to deliver a second-stage payload, likely through exploitation of PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.tw/app/431946152/roblox-hack-me-game-hack In PDF document text
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.sahebspices.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.sahebspices.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.sahebspices.com/uploaded_files/userfiles/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://www.sahebspices.com/uploaded_files/userfiles/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://www.sahebspices.com/uploaded_files/userfiles/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://www.sahebspices.com/uploaded_files/userfiles/files/minecraft-games-to-play-for-free_GM479516143.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_off00002c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C8F 22884 bytes
SHA-256: 8cc497488b8364d7455e17b23a8cf9a93980890cd49d7247a8561481c7d47af1
font_01_sfnt_off00005fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD3 18564 bytes
SHA-256: d72fd119515c4295d5a3faa63b9153fdebf548249ca0aaf49f94f43492c273d5