Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab36190af39c881…

MALICIOUS

PDF

39.1 KB Created: 2021-05-23 20:08:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bd9693fcb07a1f7ee526c424988e9cdf SHA-1: 273cbd0eecb5794bc9c3110fe80171a045930822 SHA-256: 9ab36190af39c881cb7fc7d47ce577e1d0fe0001412957806d5dcc751b84e806
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game currency. The document body and embedded links suggest a phishing attempt to redirect users to potentially malicious websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/coin-master-free-spins-link-2021-today-game-hack In PDF document text
    • http://studioarad.ro/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://studioarad.ro/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://studioarad.ro/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://studioarad.ro/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://studioarad.ro/images/free-roblox-girl-hair-not-a-model_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
stream_002_off0000381f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x381F 26964 bytes
SHA-256: 3bd5def07f81e49f012fc208c46f20a8706e33af4a0306c58d5230bca12d8bcf
font_01_sfnt_off0000762b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762B 18812 bytes
SHA-256: 705c5903f824403b328e8e9dbd2ab52a650d097fc3c0d4bbd34be772086d041a

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