Malicious PDF — malware analysis report

Static analysis result for SHA-256 57773001eb2a5b2d…

MALICIOUS

PDF

40.9 KB Created: 2021-05-21 18:08:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d2a2b78916508f22e5bf68fe0b511b47 SHA-1: 1029cd98b423d10f5b9975b24d61be5d9334a71f SHA-256: 57773001eb2a5b2dc98ecb906994109491db3324948608d5af044e08d3a8e6e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically a 'free generator / game hack' lure. The document body and embedded links promote a fake 'Robux generator' to trick users into clicking. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7499

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/431946152/how-to-get-free-robux-without-human-verification-2021-game-hack In PDF document text
    • http://gieldapracy.pl/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/how-to-get-free-robux-without-email_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000321f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x321F 27064 bytes
SHA-256: d14671547a2cee4529cf4bfb78bb372c623409b72c6e4c9991754b89062ea4df
font_01_sfnt_off00007000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7000 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off000079fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79FC 19792 bytes
SHA-256: 2fcc096d095577e17bc813bca386b7e419c64e6aba5a370ab2124621dd0af6c5

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