Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bea5f96f9788e2…

MALICIOUS

PDF

52.6 KB Created: 2021-06-03 13:36:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b454ee923ba44b41196fda35f2ab9601 SHA-1: ae8936de47f22b04ae8ffa5ee38714a8e6e01a90 SHA-256: 08bea5f96f9788e2ba89745e2bca27d134b43434270aca0ecaebb9e0014b2131
240 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA and a "free generator / game hack" lure to deceive users into clicking a malicious link. The link impersonates Amazon, aiming to facilitate credential phishing. The document's structure and embedded links suggest it is designed to redirect users to potentially malicious sites for software downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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.online/app/431946152/download-apps-for-robux-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.online/app/431946152/download-apps-for-robux-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hack-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/master-game_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/tiktok-free-folowers-jio-phone-install-tamil_GM835599320.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-match_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-roblox-fast-load-v3rmillion_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/pubg-uc-carding-method-2021_GM1330123889.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000508f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x508F 26920 bytes
SHA-256: 8a1ef093eea33767dd0a84e37a57d20ec6fbf4e5ef962285d3a88596aded6c15
font_01_sfnt_off00008e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4D 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9833 6700 bytes
SHA-256: ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
font_03_sfnt_off0000a871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA871 18996 bytes
SHA-256: ea235c61f7ee6ff97cb8e2e4b8381115f9ce59fc272e8f2939e83a9622de1179

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