Malicious PDF — malware analysis report

Static analysis result for SHA-256 f51ee2bdaaa8888f…

MALICIOUS

PDF

44.3 KB Created: 2021-05-19 06:19:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b3b3658ccf69d56533c1998e7d632dff SHA-1: ba59a26a3ffc67c7f560807f45177d544d703188 SHA-256: f51ee2bdaaa8888ff3d0544ef1c8bdf27b2e38e3726cda80097573eb4a20a508
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free generators." The primary URL identified, https://netcdn.xyz/app/479516143/minecraft-for-macbook-free-game-hack, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to trick users into visiting malicious sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-for-macbook-free-game-hack In PDF document text
    • https://rietenwinkel.nl/images/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/robux-earner_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-free_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AAE 24616 bytes
SHA-256: ede6baeb7f1f22ef6327c36da7fd3a8c5aaa4ba3bb214eab530bc5f95560faa0
font_01_sfnt_off0000819f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819F 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off00008b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B46 18040 bytes
SHA-256: e35cfce22191ce4ea9e8e8a795a10ede178e5487c7a13e4e7778456c2803af03

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