Malicious PDF — malware analysis report

Static analysis result for SHA-256 4212cddc466f5636…

MALICIOUS

PDF

41.3 KB Created: 2021-05-14 19:37:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b564ce1e6e6f735566153e39d98b910d SHA-1: a9ac2c1b525dbb8eb9c0b4e039257231a33171f2 SHA-256: 4212cddc466f5636a9922581e146c69c563d8630f40e3d5113c31f7e0656b94e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free generator / game hack' to entice users into clicking malicious links. The primary link directs to known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially harmful sites.

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/406889139/25-free-spins-coin-master-game-hack In PDF document text
    • http://w-i-r.de/images/_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/today-free-spin-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_off000047e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E8 24272 bytes
SHA-256: 7b1e9608126ead9826de7d5992cd971b7437f23ca8e4cd6803fc6e89d4e1deb4
font_01_sfnt_off00007f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F88 18144 bytes
SHA-256: e61324631e03e98c071e12442239b73d0a12fcb8243797d210d051c8d69b565d

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