Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc7b1a395042299…

MALICIOUS

PDF

44.3 KB Created: 2021-05-17 14:20:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-05-30
MD5: 1f0dc21fd4187ef3016ecb5ef1281f57 SHA-1: 12e23fd99d6a58fe8759922de2a062611153329f SHA-256: 1dc7b1a395042299b4e6987e7a46f294ca4af54c2b8757eb63ef6c50e687cbb1
240 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/free-robux-generator-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/free-robux-generator-game-hack In PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-website-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/simplysarc_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/get-me-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/robux-online_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46AE 24532 bytes
SHA-256: 1bee41b2ecb43bcdcbdce14f67897669540b77bc0f677eab7f980f3840ca04f4
font_01_sfnt_off00007f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1D 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A46 18344 bytes
SHA-256: 10e3e3d4c68cd560ea953d22ca565409121c707f4baa42eec19ee19970d6ace4

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