Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67b1f1ae73b89a4…

MALICIOUS

PDF

41.5 KB Created: 2021-05-15 13:03:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6d13b5998236e4af492b94b8a889ee0c SHA-1: 6888dae11266bdc90334b17f317d64fbf3bee240 SHA-256: d67b1f1ae73b89a4ea21ce8341072bfd90ace062e98ba1e6b69cdad9e3d7e1a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and free generators. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to lead the user to malicious websites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/minecraft-game-hack In PDF document text
    • http://rlsaluminios.com.pt/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/coin-master_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://rlsaluminios.com.pt/images/roblox-generator-no-human-verification_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46A8 26880 bytes
SHA-256: cfbe0d14f0f2fa33ad86d9794d73b3067ffa42ca273126c31de4aee01762e338
font_01_sfnt_off000081e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E7 17568 bytes
SHA-256: ce96ee2cb1800a95c911c77dfe81c9a72a479049c6676c05affe2ae793ebac2d

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