Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07d6db55fbf95b2…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 22:49:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e494bbee2d0220f14500fe5ade460863 SHA-1: 6c2f2839fc27793a769f00f0bfb3437c5a08034a SHA-256: a07d6db55fbf95b2d3e08557ddaaad52844182f8a2b25f696289ecd27859db66
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 0.9864

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/431946152/roblox-jailbreak-free-vip-server-link-game-hack PDF link annotation
    • http://library.fisip.upnvj.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-2021-free-spins-link-blogspot_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_004_off00004ffe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFE 26984 bytes
SHA-256: c6696c141512c97402fdfc313ff96a6ea5e9a92340ea56a5f978533a7330b091
font_01_sfnt_off00008e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E35 19056 bytes
SHA-256: 774f30ddb1385445a59f9e1181328a3d6bd6eb59342d4792cefa8220bd481ad8

Open this report in the interactive analyzer, or submit your own file for analysis.