Malicious PDF — malware analysis report

Static analysis result for SHA-256 999edf5e21fc5190…

MALICIOUS

PDF

46.0 KB Created: 2021-05-14 04:08:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bd2422de1a205991dfa944a943ccae6f SHA-1: 617930240e4913870db348547b26ffa28eae3885 SHA-256: 999edf5e21fc5190a2a55ae992e4b08a353e447f113b34306bb8c7b7132fc9ec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency'. The ML classifier also flagged this PDF as malicious. The presence of these links suggests the document is designed to lure users to potentially harmful websites, likely for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/coin-master-hack-spins-and-coins-unlimited-free-game-hack In PDF document text
    • https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://ombalicargo.com/new/public/ckfinder/userfiles/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://ombalicargo.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://ombalicargo.com/new/public/ckfinder/userfiles/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://ombalicargo.com/new/public/ckfinder/userfiles/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://ombalicargo.com/new/public/ckfinder/userfiles/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://ombalicargo.com/new/public/ckfinder/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://ombalicargo.com/new/public/ckfinder/userfiles/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://ombalicargo.com/new/public/ckfinder/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ombalicargo.com/new/public/ckfinder/userfiles/files/woman-roblox_GM431946152.pdfIn PDF document text
    • https://ombalicargo.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://ombalicargo.com/new/public/ckfinder/userfiles/files/noob-vs-pro-vs-hacker-vs-god-minecraft_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_off00004bd6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD6 25028 bytes
SHA-256: e88ba87cf707e078ebb3ab7bb988acbff0622975dd0785c96822459f6a77f9b1
font_01_sfnt_off000084f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F8 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00008ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFB 18752 bytes
SHA-256: 9894c068b10d635aa02e8d25afb59d141e90fd875449b50e52c6a3fbfc43112a

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