Malicious PDF — malware analysis report

Static analysis result for SHA-256 da73fcedc1fbad13…

MALICIOUS

PDF

46.6 KB Created: 2021-05-10 20:01:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 45de55f300c1825b066ecb6769ef3bd0 SHA-1: ac99ca8b13669cd13429288be311a4a6d61110de SHA-256: da73fcedc1fbad1357c328c7b169d312b051b812bdcdb0a39dbd766da2ced26a
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 0.8948

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/406889139/coin-master-free-spins-activegamer-game-hack PDF link annotation
    • http://library.smpn2-byl.sch.id//repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/wurst-download_GM479516143.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_off00004d0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D0E 24616 bytes
SHA-256: 1fc6b1d1941b93cb698e4b644833f9bd9f66d685e8505a029a996959cf90e1ed
font_01_sfnt_off000085aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AA 3700 bytes
SHA-256: 6b9109834808c31b89615a445ddebb8cf22d2831b20a67fb4738787e57703e8d
font_02_sfnt_off000092ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92BA 18548 bytes
SHA-256: 3f51c9f1d393cac92505500fdf6fe1c1727df79afd76cc4c19b11b13bc7a8d30

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