Malicious PDF — malware analysis report

Static analysis result for SHA-256 63acc714369fd891…

MALICIOUS

PDF

44.0 KB Created: 2021-05-20 02:51:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 99a2306ba173905474cd5c11ad223b50 SHA-1: 4ef62a46c655cba6970bb5dfee2ea1fdc17e8cc7 SHA-256: 63acc714369fd891bc670e62415ba1dc5ceeda845c8c0aea18d7bf2a9a0f0eb4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL pointing to a site offering 'earn robux game hack', which is a common lure for distributing malware. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external URIs and the overall suspicious nature of the content suggest an attempt to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/earn-robux-game-hack In PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/pubg-uc-india-price_GM1330123889.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/pokemon-go-free-promo-codes-2021_GM1094591345.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/2021-roblox_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/earn-robux-today_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/get-robux-com_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-online-generator-for-coin-master_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_003_off00004b05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B05 27416 bytes
SHA-256: 1f6e9086c5a27966d7b1145c0c32c106ec38d98bba394eaebd3c02a9cf204122
font_01_sfnt_off00008a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A65 18076 bytes
SHA-256: 211a529ae6a0212354e2c8faa3e6424c15162b595112409e99389753daabd842

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