Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e5df97bbe25101…

MALICIOUS

PDF

44.4 KB Created: 2021-05-16 15:16:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 193051b3eb3e73d32260c43ba6c9d22c SHA-1: 232850948798555ab27e3fb46d47b36887a8ace1 SHA-256: 69e5df97bbe2510152a14cff21a71ac069a0578b6a17a03ced06abd4dacea05d
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to malicious redirectors and lures users with a fake CAPTCHA and game hack promises, impersonating brands like Facebook and Roblox. The primary link, https://netcdn.xyz/app/431946152/roblox-hacked-version-download-game-hack, is identified as a malicious redirector. The document's structure and content strongly suggest an attempt to trick users into downloading potentially malicious content or providing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/roblox-hacked-version-download-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
  • 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/roblox-hacked-version-download-game-hack In PDF document text
    • http://www.eurosan1.ba/images/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.eurosan1.ba/images/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.eurosan1.ba/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.eurosan1.ba/images/master-game_GM406889139.pdfIn PDF document text
    • http://www.eurosan1.ba/images/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://www.eurosan1.ba/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://www.eurosan1.ba/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.eurosan1.ba/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://www.eurosan1.ba/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.eurosan1.ba/images/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://www.eurosan1.ba/images/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://www.eurosan1.ba/images/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://www.eurosan1.ba/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.eurosan1.ba/images/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eurosan1.ba/images/getrobux-come_GM431946152.pdfIn PDF document text
    • http://www.eurosan1.ba/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.eurosan1.ba/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eurosan1.ba/images/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://www.eurosan1.ba/images/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://www.eurosan1.ba/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bandicam.comIn 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_off00004713.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4713 28944 bytes
SHA-256: d829cc75ba9674fbcd22eb1f9ff52f62b84853bd53b9adf0d6f8b1915aed400a
font_01_sfnt_off0000894f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x894F 18940 bytes
SHA-256: 045b97c0477fa0a77fe25df190f3dc8d91b636a592878cab4dc6788bf6280dbe

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