Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71d3e1182fd3111…

MALICIOUS

PDF

44.2 KB Created: 2021-05-17 05:32:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e965e8a877d24a752386d92c5644aac8 SHA-1: 84fe037251111e77745a2bf9d34c4b537f76d9c4 SHA-256: e71d3e1182fd3111a99d300b7b0963ff606c0eb738c8e7b7c4839c413dd4963e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment 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 0.9976

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.xyz/app/406889139/coin-master-free-coins-and-spins-daily-summary-game-hack PDF link annotation
    • http://abris-jardin.be/images/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://abris-jardin.be/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/10-robux_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/easy-robux_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://abris-jardin.be/images/coin-master-com_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://abris-jardin.be/images/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/coin-master-free-spins-2021_GM406889139.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_off000049cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CD 27152 bytes
SHA-256: 28610c50585a7f23602ea34937b7ff80db53363c1317090a15223897ffd10dee
font_01_sfnt_off000088cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88CC 18880 bytes
SHA-256: 80e94ef00212ac5fe4220c165773dd6e8ea516dcb328b8ee80116dae5b806def

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