Malicious PDF — malware analysis report

Static analysis result for SHA-256 552d1fc1989e1782…

MALICIOUS

PDF

41.2 KB Created: 2021-05-15 06:09:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9a3bc4574b2dd007dad1791ba756a398 SHA-1: a656d4eafe78de9dba12ec9762699dd71a21930f SHA-256: 552d1fc1989e17829a9bf0cee26c2a9b19b140971dc9f8d2909a7e155e628c94
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The document body and heuristics indicate a lure to download or click on these links, likely leading to further malware or phishing. The presence of embedded URLs and the ML classifier strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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 invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/479516143/minecraft-client-download-game-hack In PDF document text
    • https://ccej.lviv.ua/images/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/optifine-mcpe_GM479516143.pdfIn PDF document text
    • https://ccej.lviv.ua/images/rbx-earn_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/i-want-robux_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-robux-please_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-robux-com_GM431946152.pdfIn PDF document text
    • https://ccej.lviv.ua/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://ccej.lviv.ua/images/free-coins-and-spins-for-coin-master_GM406889139.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004690.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4690 24656 bytes
SHA-256: 4f1e950bcf6432c3ff1bca9d1b49c97f9778819cfac6dff44e2a0acf55f13f04
font_01_sfnt_off00007e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8D 18292 bytes
SHA-256: df528b26126d4fc11b7eeaa3b1f911f76ffca14ff52ae065bc56290066d0d251

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