Malicious PDF — malware analysis report

Static analysis result for SHA-256 5554b29501dad850…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 03:30:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 84f8f7519d9f75d6c3642aec13dc75c4 SHA-1: 6a112123c90d3816d5c491a9d49a3fcafbc9eff7 SHA-256: 5554b29501dad850cce901299c9659750b4f0d74371367fb435b5fad51f99ee3
220 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites that are identified as malicious redirectors and part of a link farm. The document body explicitly mentions 'game hack' and 'free spin link', indicating a lure for potentially unwanted or malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/how-to-get-coin-master-free-spin-link-game-hack In PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/original-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004911.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4911 29244 bytes
SHA-256: 73dc3207208eda9f1d041446ccbb1d1df5ec7422cfe46965be48194c386b5269
font_01_sfnt_off00008408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8408 18220 bytes
SHA-256: b2f7f6595bf64a30853f7d52e44db90316d94cc0a70445ac6854799e3a79afd4

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