Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec30f2cf73eebed4…

MALICIOUS

PDF

46.1 KB Created: 2021-05-17 21:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 065762f62f3ea4ae591f2eb574601ff3 SHA-1: 7dbe299a962c480e41cd94a7ed90828c5312cd19 SHA-256: ec30f2cf73eebed477a3dd06df4a51d67f82369ebf0911792ba255ece5726e70
122 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 brand-impersonation credential phishing. 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 0.9980

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/free-robux-no-downloading-apps-game-hack.
  • 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/431946152/free-robux-no-downloading-apps-game-hack PDF link annotation
    • https://www.les-sp.org/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.les-sp.org/images/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://www.les-sp.org/images/earn-rbx_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://www.les-sp.org/images/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • https://www.les-sp.org/images/is-there-any-way-to-get-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_off000049cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CC 30816 bytes
SHA-256: 41592929b12788566634525560a513de05a25e4a9f82085fe707f4d5b49ef795
font_01_sfnt_off00008eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAC 19404 bytes
SHA-256: 49b6dfa9b56ae39db803e39cb2f1ecc2093e69bc279e239e32c5359198169209

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