Malicious PDF — malware analysis report

Static analysis result for SHA-256 0627c4864f5c15f2…

MALICIOUS

PDF

48.7 KB Created: 2021-06-03 22:40:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 898b0a67f2adfd753d5f53990fa686d0 SHA-1: c81a23103733838ed7de2944a02bdf70d632b25f SHA-256: 0627c4864f5c15f28e18fa00ab2b7ab2ef69d78432fc11a4fbba8e87461e1d35
122 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. It uses a password-protected-archive lure. 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 0.9796

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/how-to-get-free-robux-without-downloading-apps-2021-game-hack PDF link annotation
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-robux-now_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/pokemon-go-free-quest_GM1094591345.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_004_off00005437.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5437 25120 bytes
SHA-256: 955fa55815408e7fdc540f9d950dcb71617cf6747cd492c63e23ead4343f8d57
font_01_sfnt_off00008b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B91 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000957c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x957C 20276 bytes
SHA-256: dfaf102e4a8660aec521ea97dbe5e1677fef1ca2e266cad45ab84be3fc58cd38

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