Malicious PDF — malware analysis report

Static analysis result for SHA-256 670fa24c72fbb482…

MALICIOUS

PDF

44.2 KB Created: 2021-06-08 22:31:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2aaceb0f51be3f12a2fb926755affdd2 SHA-1: 80fb2b574e50db3da8399b0fa4e000ba301634eb SHA-256: 670fa24c72fbb482dd4459e103f5578e66582ac63f3b162d794db90f1cebe672
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 0.9865

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.tw/app/431946152/how-to-cheat-robux-game-hack PDF link annotation
    • http://lib-smansumsel.sch.id/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/pokemon-go-free-egg-incubator_GM1094591345.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-ban_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_004_off00004f72.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F72 25132 bytes
SHA-256: 36c1253c19478e39a54da27af3bb8269c27e28db3f0664089f576718360dcf74
font_01_sfnt_off0000893e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893E 18512 bytes
SHA-256: a8239f7e6169ab1ad95c4dbc8a27896e0614d3f3089334c04a0bec6d1318e75c

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