Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e441b5019dec6fe…

MALICIOUS

PDF

44.5 KB Created: 2021-05-14 23:36:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 255a033a7df3e6661fd050ab2adf8396 SHA-1: 928575875db405dd67b53218e8643552140331eb SHA-256: 8e441b5019dec6feceecc1c0fdccfcfb4fe7c5d3a19ffd92079f9bf4101fffa0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9632

Heuristics 4

  • 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.xyz/app/431946152/free-robux-giveaway-live-game-hack PDF link annotation
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/mathep_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-free-spin_GM406889139.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://elearningmts01sgs.sch.id/__statics/gudangsoal/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000044f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x44F2 25472 bytes
SHA-256: c289972ee92a14ae59a4543d23ef1f63556ed7439a111597cabf44645748b54a
font_01_sfnt_off00007fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBA 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off00008976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8976 18820 bytes
SHA-256: 3db94d24ba3abe2bdb9d310b65f8480e65e9005ffe127367b6d2ef8ae08c9d7b

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