Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29e5b68f69301b0…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 10:06:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b48e76b6a6985bb2508414ca11c4bc9c SHA-1: 0abb8416a6609561086db74ca7ca3a1bb4b44b0a SHA-256: d29e5b68f69301b0e185fd7e022161c4a753b4c94b1f26c86cdaafe5e824d1c0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many of which are part of a link farm designed to appear as legitimate resources for game hacks and free currency. One primary URL, https://netcdn.online/app/431946152/how-to-get-free-robux-by-playing-games-game-hack, is identified as a malicious redirector. The document body, though heavily corrupted, contains references to 'free Robux' and 'game hack', aligning with the heuristic findings. No scripts were extracted, but the structure suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.online/app/431946152/how-to-get-free-robux-by-playing-games-game-hack In PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.sourcology.com/uploaded_files/userfiles/files/how-to-get-tiktok-likes-for-free_GM835599320.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_004_off00005366.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5366 26692 bytes
SHA-256: 9a9131fd1253b483a2043ae3e509e77f234a4e207780a927da0f7b718b75425f
font_01_sfnt_off00008fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDF 19588 bytes
SHA-256: 4959be52701d88ef79c98b835575558ad206ad5c377459138293e90af74f97c3

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