Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb2f5fa8fd2d704…

MALICIOUS

PDF

37.7 KB Created: 2021-05-06 11:13:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 21cbfcb9fd777d5de0c4c3fd2cbbd96b SHA-1: 028567aedb98e1f740486850677a638951d630a5 SHA-256: 9bb2f5fa8fd2d70438c91844b60804be2834603ed87f773399f5d25e46d542b9
138 Risk Score

Malware Insights

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

The PDF file contains a lure for a 'game hack' and includes a call-to-action button, aiming to trick users into clicking a malicious link. This link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in game hacks to redirect them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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-hack-someones-roblox-account-2021-game-hack In 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_off000034c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34C5 26436 bytes
SHA-256: 58b4452945f111fa4ceef26bc6dcbedebf60f3fc59c45d314322a44e9d0bba3c
font_01_sfnt_off00007053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7053 18824 bytes
SHA-256: b8ea8d0d1edd338ba7ff0649a70fd916732917f3a400f38e25af8904baad8adf

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