Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f9ff0f5689cbfc…

MALICIOUS

PDF

43.2 KB Created: 2021-05-14 14:44:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0936c2cdae9d55634fa69f9944324cb2 SHA-1: 21d9d884b8a4f4da463f94df0cb5ccae71387f53 SHA-256: d6f9ff0f5689cbfcf0786d67e2c356a84c744d2d073c950f81270b3aa2b64254
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 0.9969

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/479516143/minecraft-mod-menu-apk-game-hack PDF link annotation
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1kulonprogo.sch.id/__statics/gudangsoal/files/give-me-free-robux_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_003_off00004d30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D30 25532 bytes
SHA-256: 7ee98394517c389d0617013cec72b902a5e9dc9b5b34f27b2fcaa41ca93b7fa0
font_01_sfnt_off0000865a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865A 18372 bytes
SHA-256: dd56030cd3d2a3e70d7932d5191cbad959afee4333ac7fd4180e1cf7291cf5ff

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