Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc14d7af899243d…

MALICIOUS

PDF

49.4 KB Created: 2021-05-17 16:30:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b48fe9d449389ee929c0f4d05185d47d SHA-1: 9626dcac5a03c3f1c361993ce97716ae180fea43 SHA-256: 8bc14d7af899243dc7ea41c6c70c74c4e40d9456968b81d66be31d72ebe020d8
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 0.9349

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-verification-no-download-2021-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-verification-no-download-2021-game-hack PDF link annotation
    • http://asiashop-france.fr/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://asiashop-france.fr/images/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://asiashop-france.fr/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://asiashop-france.fr/images/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://asiashop-france.fr/images/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://asiashop-france.fr/images/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://asiashop-france.fr/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://asiashop-france.fr/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://asiashop-france.fr/images/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://asiashop-france.fr/images/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://asiashop-france.fr/images/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://asiashop-france.fr/images/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://asiashop-france.fr/images/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://asiashop-france.fr/images/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://asiashop-france.fr/images/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://asiashop-france.fr/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://asiashop-france.fr/images/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://asiashop-france.fr/images/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://asiashop-france.fr/images/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://asiashop-france.fr/images/earn-free-robux-today_GM431946152.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_003_off000049f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F1 30520 bytes
SHA-256: 7b0293717d14c01dbf4046f0ce36683f73a0c2812754986aafbd4fa0abcb3a3c
font_01_sfnt_off00008e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0F 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB7 19584 bytes
SHA-256: 6d060c19cfdcabcdc6bddd80792e5ccefe5b0efd90c0cd3f16f1565492dd4e8c

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