Malicious PDF — malware analysis report

Static analysis result for SHA-256 130cffd9c2a4dbd4…

MALICIOUS

PDF

43.6 KB Created: 2021-05-18 04:17:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 46e9994e2405e9b454a0e7d33a85c238 SHA-1: 78459876fc3063a8d08bfa4882395769e677f456 SHA-256: 130cffd9c2a4dbd4c9ad9f69efea89d3c6be6956565415b6a99e144291af25ec
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/roblox-game-free-download-game-hack PDF link annotation
    • http://nationshield.ae/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-rewards-link_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_off00004a29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A29 25592 bytes
SHA-256: 846858dc230c1e76c8889cbc4ef8ea1087b234ece9ed563f88e5544f20194c0c
font_01_sfnt_off0000860a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860A 18944 bytes
SHA-256: 24334cb4fb439f8e8a77e363ed5125029932f1001a0c368d5bddcb4d56c7855b

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