Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba0aa2947ef55a6…

MALICIOUS

PDF

39.0 KB Created: 2021-05-10 13:17:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4ea44b692a14968951045ea7caefe5fe SHA-1: 3151f41d7c0e268f8c9afed12d5d3fae35d552af SHA-256: 1ba0aa2947ef55a6ca6fd4c8efe21af75eaa0f1279bcd864998af0b426fcd9b4
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a malicious link disguised as a 'free generator / game hack' and presents a fake CAPTCHA to trick the user into clicking it. This likely leads to a phishing or scam page. The embedded URL https://netcdn.xyz/app/431946152/free-robux-android-game-hack is a primary indicator of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9280

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/free-robux-android-game-hack In PDF document text
    • http://jijel.info/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://jijel.info/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://jijel.info/images/free-robux-survey_GM431946152.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_off0000358c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x358C 29288 bytes
SHA-256: 95638ebf2508ccf7e28cc411fdd720e4b3b27bf3e47cf791dfa1e0d537864dc9
font_01_sfnt_off000076e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E7 18308 bytes
SHA-256: 3d682ae06d788585f0d48ef4471ddbfed33e391fd6a867cb0ce2fb595824b3ec

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