Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d7af1434a208ca…

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 09:23:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aa6ec0ed5a5fe6826d056c4faf3d6ca7 SHA-1: 2891906e0d4f25d772cd0502650c3941f5bbf391 SHA-256: 50d7af1434a208ca5f811deeb7ce3d5faad008cec63e5f4575edb8502789110f
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 0.9832

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/how-to-hack-minecraft-pe-game-hack PDF link annotation
    • https://digilib.darmajaya.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/how-to-get-free-robux-without-verifying-2021_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_off000054ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54AC 29924 bytes
SHA-256: 6762e74db8b4324447632d8e3885a785c4e0b0004ad83ae7df7c75ec897364bd
font_01_sfnt_off00009805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9805 18196 bytes
SHA-256: d34ad1dbd9dd4a0600043f837e3a6c6fdafb13b781254d1b565cb7d4b46c75dd

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