Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70590cb4bfd3731…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 05:42:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bfadb9c09f7e34fb6f1ee2cf68842854 SHA-1: fdde4b487c7367ea7409cdcaf28b8ee846398334 SHA-256: d70590cb4bfd3731086e569781537872359ee9b34db435b603b9dad2d5e975b9
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 0.9797

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-332-apk-free-download-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-coin-master-apk-32-download_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004c3f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C3F 24292 bytes
SHA-256: 848bb3e0ce722ce8bbf5b6654079eef97c171908bc47f44a474cc352edd9556b
font_01_sfnt_off000083c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C9 2896 bytes
SHA-256: 98478e2fbfabd582329b6206c0d46f67523cf5e299cb16118f1065b4dd5ec6a6
font_02_sfnt_off00008db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB0 18936 bytes
SHA-256: 826378527b29e003d3d383295d63670b99dc7beb67fbb5c5ef13eaf6391d900e

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