Malicious PDF — malware analysis report

Static analysis result for SHA-256 794aed96ac801a29…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 04:04:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 191a84c2ddead58f7f59b1b969a19744 SHA-1: 0d02058b30430cf52657c692c67a8699762a3d5a SHA-256: 794aed96ac801a291b9d95d910d783991f275285a67057fb3b81f031a85dab10
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/406889139/coin-master-unlimited-spin-link-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-tiktok-like_GM835599320.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/instantrobux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-bonus_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-coin-master-game-2021_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_off00004fb2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FB2 24036 bytes
SHA-256: 59b797251dbc7e5fa203e41ce181d1b17f6c95e686c1486826caf8e40aa9ee6b
font_01_sfnt_off00008655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8655 18584 bytes
SHA-256: 4b9e97571f76fbd37980e49efa03e4d0776fec80245dbf17b6cc6ba6596e58ec

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