Malicious PDF — malware analysis report

Static analysis result for SHA-256 098e67bed4c80050…

MALICIOUS

PDF

42.0 KB Created: 2021-05-17 07:33:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 087148efa042ed65171a3e4de6e31b3d SHA-1: 04e070eb385b38bde4b21db3ce6a6a6135bd92ac SHA-256: 098e67bed4c80050b5b5e64b813687f31da9a5c3faa93bf5894e61780efdc6f8
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 0.9971

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/406889139/claim-free-spins-coin-master-game-hack PDF link annotation
    • http://www.isril.it/images/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.isril.it/images/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://www.isril.it/images/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://www.isril.it/images/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://www.isril.it/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.isril.it/images/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.isril.it/images/roblox-password-hacker_GM431946152.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_off00004416.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4416 27184 bytes
SHA-256: 178d95ee98d35fb7395cf95b9aa9022eee606dda3af881c6639661c8f7a5e35c
font_01_sfnt_off0000824a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824A 18220 bytes
SHA-256: a27868aca9095d1db43e3a34661a683bdd93dcaecb4c52cce590f5e85fca806a

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