Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2beadfedfbf7f33…

MALICIOUS

PDF

47.5 KB Created: 2021-06-04 01:01:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f0c014596ed330cc1b8aae9faf9ae184 SHA-1: 25960a96d8451b8a8ba96de7383d3d551d82c08c SHA-256: a2beadfedfbf7f3336bfa4db8644876bc3bb5162f6325eb4d70c03a39f1d0598
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a seed-phrase/secret-recovery 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 0.9769

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.online/app/406889139/coin-master-free-spin-daily-bonus-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/make-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/whats-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_off00004ebe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EBE 25176 bytes
SHA-256: 6b72020a0138d0ecf4cebfc23602f074f7f600ad54ea109b79d1246540d6e77b
font_01_sfnt_off00008821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8821 4020 bytes
SHA-256: 7d3617ecf51e14e6cffc9372c4441988c3b6cb3ea010f7512aee6af842ef388d
font_02_sfnt_off000095ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95AB 18664 bytes
SHA-256: 29d8625a2420ffd124556d82128af1f24a8175557156c607f082fe8065d24199

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