Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff285755b7f677ef…

MALICIOUS

PDF

45.6 KB Created: 2021-05-16 13:04:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a664f82884e78beafd6997a7aae71a36 SHA-1: 6aab34af0067f810d9e2feaccd45bb07e802e4e7 SHA-256: ff285755b7f677ef353157d4bd6c17dfae3a819dace26a8440fe9644a7bb84bd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are identified as malicious redirectors, specifically promoting 'free generator' or 'game hack' lures. The document body and embedded links suggest a social engineering tactic to trick users into visiting these sites, which likely host further malicious content or phishing attempts. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users to harmful infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/406889139/free-coin-master-hack-no-verification-game-hack In PDF document text
    • https://ethraa.ae/userfiles/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-spins_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-a_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-scam_GM431946152.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_off00004c4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C4C 25268 bytes
SHA-256: aa5bfd257b7ca67319e825880860c5757d3f3d013fcc0e51cb45d2d8bf6c1934
font_01_sfnt_off000086e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E4 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9095 18016 bytes
SHA-256: 22df04c4dacbc852f4ecaf83adb1826ed6293343c5161e377e09b669fc2092ee

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