Malicious PDF — malware analysis report

Static analysis result for SHA-256 515de06563efdc02…

MALICIOUS

PDF

39.0 KB Created: 2021-05-10 10:10:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1c37adc87d87bfb3aed3e8f6bacc98c8 SHA-1: f808c5b544e52af5fdaf0c71eaadf60fae6b6ed5 SHA-256: 515de06563efdc0250bfe3960fa199e9c9c12f75fd2f0ba110a41388a7331ac0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The document body also explicitly contains the malicious URL and a call-to-action phrase, reinforcing the phishing attempt. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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/free-coin-master-hack-no-verification-game-hack In 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_003_off00003449.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3449 25096 bytes
SHA-256: 7f9996e154e490c3d5159cc0f78a75879653cb47ec0b3624b861fc78d185707b
font_01_sfnt_off00006df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF1 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000077a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A3 18016 bytes
SHA-256: 22df04c4dacbc852f4ecaf83adb1826ed6293343c5161e377e09b669fc2092ee

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