Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb337bc3c4588d04…

MALICIOUS

PDF

43.1 KB Created: 2021-05-14 01:47:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d43a53c6f5b32dd937a5bc59d44cd4a2 SHA-1: 1de369b89a4c20482fc65f24e3d71c9a2ea5efb6 SHA-256: bb337bc3c4588d04e3eb8b7f0b8434f89619da521505aa9b6ad38bb9b96c7a06
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generators" or "game hacks" for popular games. The primary malicious link identified is https://netcdn.xyz/app/479516143/minecraft-bedrock-free-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow, likely intended to lead users to further malicious content or downloads. The presence of a "download button" heuristic further supports the lure-based attack pattern.

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-bedrock-free-game-hack In PDF document text
    • http://linde-erbach.de/images/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://linde-erbach.de/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://linde-erbach.de/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://linde-erbach.de/images/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://linde-erbach.de/images/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/coin-master-link_GM406889139.pdfIn PDF document text
    • http://linde-erbach.de/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://linde-erbach.de/images/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://linde-erbach.de/images/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c3f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C3F 26312 bytes
SHA-256: f00aa6f977cb5b1e8e21d14429c27cb57c25b0a274c34d6b7aea811c27e5e3ae
font_01_sfnt_off00008620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8620 18268 bytes
SHA-256: 421dc37018d5e6f1467ffbccbacebf5894202cb157ac672e86022266516fa266

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