Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb62e4b3a284cd7f…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 06:49:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 30555a868c291671e1c0760c7e3940ec SHA-1: 69d283b21dae602b448027c74436dc9cd8eed5c7 SHA-256: cb62e4b3a284cd7f503c612435de991745a294852ae22f90ef64bede9cdfbd46
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, including one that masquerades as a free game hack or Minecraft generator. The document body and embedded links suggest a social engineering lure to entice users to click through to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and the nature of the links indicate a high likelihood of further malicious activity, such as downloading additional payloads or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.
  • 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/479516143/try-minecraft-free-game-hack In PDF document text
    • http://www.ocic.hr/files/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/tiktok-free-view-easy-verification_GM835599320.pdfIn PDF document text
    • http://www.ocic.hr/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/www-roblox-robux_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/what-tiktok-free-like_GM835599320.pdfIn PDF document text
    • http://www.ocic.hr/files/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/robux-gainer_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/free-spin-coin_GM406889139.pdfIn PDF document text
    • https://education.minecraftIn 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_004_off000051b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B3 24516 bytes
SHA-256: 10727f607ba0a4ae7757bf94ead51b6172a8aa2712f47e6e12f7d2353291d465
font_01_sfnt_off000088b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B8 17748 bytes
SHA-256: 107932d4c819bf12e68df3d86f91d46cdcad91a8442b853cf72bc94cc41b7ea1

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