Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f41a5510245a5e…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 08:02:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7ee7aca425f3ee8b9a361b7e26406da9 SHA-1: 165f05b88e2d3355ec9873ea8d57be96f54309bf SHA-256: 07f41a5510245a5e71f1856e1ff596cc59588706b41478cbaf1abb01acac534a
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 0.9865

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/479516143/free-minecraft-windows-10-with-java-game-hack PDF link annotation
    • https://library.fdk.ac.id/repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/robux-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-free-followers-and-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-no-verification-2021-ios_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_004_off00005322.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5322 25220 bytes
SHA-256: dba04fb63757e235e26558298476364686925773f2aef658474468a34f3713c7
font_01_sfnt_off00008bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBE 18972 bytes
SHA-256: f8addffde6ee253966e41eae90cec454d3cd0db0a10e1e45b392757e131b0e3a

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