Malicious PDF — malware analysis report

Static analysis result for SHA-256 8775d5f1aa913999…

MALICIOUS

PDF

44.9 KB Created: 2021-05-17 06:07:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6a8e18a2d1972fea46bd0fbc26e42fb1 SHA-1: 75aaf949cd6a3194fac4748faa3200538eaa247f SHA-256: 8775d5f1aa9139997f2cd2d1c9ec9974b0d0959f3493a18c13092e5d6e5a778f
160 Risk Score

Malware Insights

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

This PDF document employs a lure related to free game currency and hacks, directing users to a malicious redirector. The redirector, in turn, hosts multiple other malicious PDF files, indicating a chain of malicious content delivery. The ML classifier also flagged this document with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/how-do-you-get-free-robux-2021-game-hack In PDF document text
    • http://stitchingart.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://stitchingart.com/images/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://stitchingart.com/images/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/rbx-claim_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A6 24792 bytes
SHA-256: dc19f367dd54cc024a8425e957162ed5706f62a1e1dd55c0779aac512a7358b0
font_01_sfnt_off00008103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8103 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB2 19016 bytes
SHA-256: 7afc4835c6f8d200a546e15f78f642ba5dd88c8fac7df04bc3003dd1e9f7232a

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