Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8c2f4c0cad4b21…

MALICIOUS

PDF

38.4 KB Created: 2021-05-22 06:38:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 064aba4e0f9c2015b82bce829f9aa197 SHA-1: 732eda9633fd304fadfe6fd6896548765c43705d SHA-256: 9a8c2f4c0cad4b219efd878c7b627d5174681155b51e2bcb1356ac1c8aaf9a3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The document body and heuristics indicate a clear intent to trick users into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/835599320/free-tiktok-followers-generator-game-hack In PDF document text
    • http://ferienwohnung-walker.de/images/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/coin-master-free-spin-daily-link_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_002_off00003460.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3460 29272 bytes
SHA-256: eb9859f5cff0f3524b0db0f2b5badaf629d7dfaf6546409b258efd0e51b06cd2
font_01_sfnt_off000075e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E6 17924 bytes
SHA-256: 15e81544c7296339f60406a70d440ba472803439c3c01f92585f07e7e66dad8a

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