Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c0ae5a11eeaecd…

MALICIOUS

PDF

35.8 KB Created: 2021-07-02 00:05:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6946184f65ab21c496125ceb239bc131 SHA-1: 2d50bfbd7dfd7245576fd729b7a49f9fa31bae2d SHA-256: b2c0ae5a11eeaecdcc3d19835a0f51085edf8bf665c35a65f6e00c866f3f00a7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a malicious SEO link farm, containing numerous links to other PDF files, likely designed to attract users with promises of free in-game items or hacks. The presence of a "download button" heuristic further suggests a deceptive user interaction. The ML classifier strongly indicates malicious intent, likely to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/free-hoverboard-roblox-mad-city-game-hack PDF link annotation
    • http://library.yamasi.ac.id//repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/when-will-roblox-bloxburg-be-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/haw-to-get-free-dominus-on-roblox-2021-march_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-barbie-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-no-saving-site-youtubecom_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/auxs-roblox-hack-pack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-script-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-generator-hack-2021-apk_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-jailbreak-how-to-get-all-cars-for-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-scam-on-roblox_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
font_00_sfnt_off00003350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3350 22556 bytes
SHA-256: f63c32e97c8a0ab7563e37bc5ec184d267260f03832e77f855501abe21e9a330
font_01_sfnt_off000065b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B5 19540 bytes
SHA-256: 1afba83f5a87d76441b38ff26beb495852865c00c562b3b99ee0e0d9e49901b1

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