Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd30dcd0a7c6f536…

MALICIOUS

PDF

30.5 KB Created: 2021-07-24 10:47:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 791669825b337146378cafd7ffa5e760 SHA-1: e5b3cd3ef581a85649dd7926f8fa6f119951eac3 SHA-256: cd30dcd0a7c6f5362f313e9cc8e63e27652bfca9fa4ef09885a6c2b226844ce1
130 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'game hack' or 'generator'. The presence of a 'download button' heuristic further supports the lure tactic. While no scripts were extracted, the PDF structure and malicious links indicate an attempt to trick the user into visiting a compromised site, likely to download further malware or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier clean score 0.0486

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 http://netcdn.tw/app/479516143/how-to-hack-a-minecraft-server-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
font_00_sfnt_off0000246b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x246B 22380 bytes
SHA-256: db04b6521507952efb6d3ad9863951fb9b02b5bc37b3cc45727fe0b5b5f32dd0
font_01_sfnt_off00005662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5662 18156 bytes
SHA-256: a161276dde2563737e729d23e9d7b4e88663ff4ff7cddafc48ded70db5af995a

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