Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5478aa0e17520f3…

MALICIOUS

PDF

29.9 KB Created: 2021-07-19 06:41:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7c32fcf9bed47a2ec2105d7f70c21739 SHA-1: 0f221ed898fb4abda402db5a929dc40fb2d7022d SHA-256: b5478aa0e17520f36cb1c049f19f5d2a8613f43eb2b727f0001d19ff8768b3f5
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, directing users to external websites that promise game hacks or generators. One of the linked URLs uses an IP address, which is a common tactic to evade domain-based detection. The document's content and heuristics strongly suggest a social engineering lure to trick users into visiting potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0794

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/coin-master-free-spins-game-hack PDF link annotation
    • http://45.115.65.99/__statics/gudangsoal/files/free-tiktok-likes-generator_GM835599320.pdfPDF link annotation
    • 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_off0000214e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x214E 22852 bytes
SHA-256: f8d6f38bad90f5e0d11087c748bc775357f3c45e090e15ba81ffd8bd46742e7c
font_01_sfnt_off00005489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5489 17884 bytes
SHA-256: 7b855ef2bb944b5b370c61480927ccad63ff31bdbf820bc1f0da9d35a10f5fb2

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