Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba713a2033461ffc…

MALICIOUS

PDF

39.7 KB Created: 2021-05-22 12:41:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f460501943b4222aabbd45e70b21b481 SHA-1: 1397db0b474202ba9124ec47d5dae6fe92b3f7fe SHA-256: ba713a2033461ffc9a996414407a73bd045aeb2bf6a4a1a39c881721d6925f63
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a malicious generator site, masquerading as a way to obtain free Robux. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the lure text strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8068

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/robux-hack-generator-game-hack In PDF document text
    • http://cacpglobal.ca/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33FE 25520 bytes
SHA-256: d77e0262e87ee9e31c718edce71096f3c89ef8c4ed611cb83ba92121f61ef005
font_01_sfnt_off00006faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAF 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off0000794f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x794F 18352 bytes
SHA-256: f5433ce3dc9930d213a8e7315569ee207b9df6dd56817c97a1fb358bc14a6a3b

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