Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d39f0730f27392d…

MALICIOUS

PDF

34.8 KB Created: 2021-05-13 00:14:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 05abd07c6064ee31756e5fe9a47e983b SHA-1: 4fba29588e6f8eddbfca6ec8a38475ded4a0a88b SHA-256: 2d39f0730f27392d3404066ddc3650618d089f0ba7355fd71621f246f3592404
130 Risk Score

Malware Insights

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

The PDF contains multiple critical heuristic firings indicating malicious redirector links, specifically targeting users with a 'free generator / game hack' lure. The embedded URL leads to known malicious infrastructure, suggesting an attempt to deliver a secondary payload or redirect to a phishing site. No scripts were extracted, but the PDF structure and heuristics strongly suggest a malicious intent to exploit user curiosity for financial gain or further compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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/406889139/reddit-coin-master-free-spins-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000308a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308A 24172 bytes
SHA-256: 25b3a1afccd12be7f3145dc20e98ab533052993b6d928ddfe35d8da278aeb8c5
font_01_sfnt_off0000675d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675D 18060 bytes
SHA-256: ccf5ccc44795e70c5c18ecb3356edd3211558c7f4a4929a106554d4b04000f5d

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