Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7085dd895df62c…

MALICIOUS

PDF

42.8 KB Created: 2021-06-03 08:20:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bc8adebbb508c69c080737e1907eba68 SHA-1: ff20d9056b1ed761c05cb2dea6d6595c4977af0f SHA-256: 9d7085dd895df62ce73031893d641bd8f21fde61f3a3ef30af76f53ab6523029
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple external links, including one disguised as a game hack generator, which redirects to a URL that appears to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a primary purpose of driving traffic or SEO manipulation rather than delivering a direct payload. No scripts were extracted, limiting the analysis of direct malicious execution within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/406889139/card-hack-for-coin-master-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/pokemon-go-free-and-pokeball-plus_GM1094591345.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-executor-purple-bunny_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-2021-haktuts_GM406889139.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_004_off00004e28.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E28 24304 bytes
SHA-256: d8621983a9123ca785079a17732b7e2da0da37ad4d06cfb5f6aa048208a5c0f0
font_01_sfnt_off00008566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8566 18056 bytes
SHA-256: 16c04f841c276c9143b9cdeba32c018779ebf720d5ca55aa256a698217b90b2b

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