Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1d3959ca43e0a6…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 22:23:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7c4a12848d059dee5cc1add6f310149c SHA-1: 05b8ec8355ce71d589a02a10723af8311358122e SHA-256: be1d3959ca43e0a6e9b62fa88961a9fd6c1a3f76d41fcbb889068a4539fa5d42
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-hack-without-verification-or-downloading-apps-game-hack PDF link annotation
    • http://perpus.i2s-learning.com//repository/coin-master-hack-without-human-verification-india_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/cm-daily-spins_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_off0000518e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518E 24616 bytes
SHA-256: 1376f1875e35ed584ead509cefcf238bd948c387aaeb1aa534635eb411cc9a29
font_01_sfnt_off000088da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DA 19400 bytes
SHA-256: 7055c0b927c5b3f5d83892c818414459ed7060aca91a64b83b2bd90b5073d3c7

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